遍历下一个和上一个 jQuery 选项卡

我有一个奇怪的设计，然后被编码为：

<div class="white-wrap row people-grid">
   <ul class="people-list  row">
      <li class="person row">
         <div class="inner row">
            <div class="image"> <img src="images/peterHarthill.png" alt="peterHarthill" width="240" height="226"> </div>
            <div class="info"> <span class="name"><span>Peter</span> <span>Hartill</span></span> <span class="role">Chairman</span> <a class="selected expand-person" href="#pete1">Toggle more</a> </div>
         </div>
      </li>
      <li class="person row">
         <div class="inner row">
            <div class="image"> <img src="images/peterHarthill.png" alt="peterHarthill" width="240" height="226"> </div>
            <div class="info"> <span class="name"><span>Peter</span> <span>Hartill</span></span> <span class="role">Chairman</span> <a  class="expand-person" href="#pete2">Toggle more</a> </div>
         </div>
      </li>
      <li class="person row">
         <div class="inner row">
            <div class="image"> <img src="images/peterHarthill.png" alt="peterHarthill" width="240" height="226"> </div>
            <div class="info"> <span class="name"><span>Peter</span> <span>Hartill</span></span> <span class="role">Chairman</span> <a  class="expand-person" href="#pete3">Toggle more</a> </div>
         </div>
      </li>
   </ul>
   <ul class="expanded ">
      <li class="tab active" id="pete1">
         <article class="expand row">
            <div class="info">
               <h1>Perter Hartill</h1>
               <h2>Chairman</h2>
               <p>Peter was a Senior Audit Partner with Deloitte, based in their Birmingham office, having retired on 31st May 2008.  Peter was with Deloitte for over 40 years based mainly in the Midlands but also spent time at their offices in London and Washington US.  During his career he acted for most of Deloitte's major Midlands clients and one of his specialist areas was the real estate sector.
                  Peter became Chairman of Deeley on 1st January 2009.
                  Peter is married with 2 step-children and enjoys golf and other sports. 
               </p>
            </div>
            <aside>
               <ul class="qualifications">
                  <li><strong>Qualifications</strong> Chartered Accountant</li>
                  <li><strong>Professional Affiliations</strong> FCA</li>
                  <li><strong>Start Date</strong> September 1988</li>
               </ul>
               <div class="share row">
                  <h2>Share</h2>
                  <ul>
                     <li><a href="#"><i class="fa fa-facebook" aria-hidden="true"></i></a></li>
                     <li><a href="#"><i class="fa fa-twitter fa-6" aria-hidden="true"></i></a></li>
                     <li class="linkedin"><a href="#"><i class="fa fa-linkedin" aria-hidden="true"></i></a></li>
                  </ul>
               </div>
            </aside>
         </article>
         <span class="collapse-btn">collapse</span> <span class="collapse-next-btn">next</span> <span class="collapse-prev-btn">prev</span> 
      </li>
      <li  class="tab" id="pete2">
         <article class="expand row">
            <div class="info">
               <h1>Perter Hartill</h1>
               <h2>Chairman</h2>
               <p>Peter was a Senior Audit Partner with Deloitte, based in their Birmingham office, having retired on 31st May 2008.  Peter was with Deloitte for over 40 years based mainly in the Midlands but also spent time at their offices in London and Washington US.  During his career he acted for most of Deloitte's major Midlands clients and one of his specialist areas was the real estate sector.
                  Peter became Chairman of Deeley on 1st January 2009.
                  Peter is married with 2 step-children and enjoys golf and other sports. 
               </p>
            </div>
            <aside>
               <ul class="qualifications">
                  <li><strong>Qualifications</strong> Chartered Accountant</li>
                  <li><strong>Professional Affiliations</strong> FCA</li>
                  <li><strong>Start Date</strong> September 1988</li>
               </ul>
               <div class="share row">
                  <h2>Share</h2>
                  <ul>
                     <li><a href="#"><i class="fa fa-facebook" aria-hidden="true"></i></a></li>
                     <li><a href="#"><i class="fa fa-twitter fa-6" aria-hidden="true"></i></a></li>
                     <li class="linkedin"><a href="#"><i class="fa fa-linkedin" aria-hidden="true"></i></a></li>
                  </ul>
               </div>
            </aside>
         </article>
         <span class="collapse-btn">collapse</span> <span class="collapse-next-btn">next</span> <span class="collapse-prev-btn">prev</span> 
      </li>
      <li  class="tab" id="pete3">
         <article class="expand row">
            <div class="info">
               <h1>Perter Hartill</h1>
               <h2>Chairman</h2>
               <p>Peter was a Senior Audit Partner with Deloitte, based in their Birmingham office, having retired on 31st May 2008.  Peter was with Deloitte for over 40 years based mainly in the Midlands but also spent time at their offices in London and Washington US.  During his career he acted for most of Deloitte's major Midlands clients and one of his specialist areas was the real estate sector.
                  Peter became Chairman of Deeley on 1st January 2009.
                  Peter is married with 2 step-children and enjoys golf and other sports. 
               </p>
            </div>
            <aside>
               <ul class="qualifications">
                  <li><strong>Qualifications</strong> Chartered Accountant</li>
                  <li><strong>Professional Affiliations</strong> FCA</li>
                  <li><strong>Start Date</strong> September 1988</li>
               </ul>
               <div class="share row">
                  <h2>Share</h2>
                  <ul>
                     <li><a href="#"><i class="fa fa-facebook" aria-hidden="true"></i></a></li>
                     <li><a href="#"><i class="fa fa-twitter fa-6" aria-hidden="true"></i></a></li>
                     <li class="linkedin"><a href="#"><i class="fa fa-linkedin" aria-hidden="true"></i></a></li>
                  </ul>
               </div>
            </aside>
         </article>
         <span class="collapse-btn">collapse</span> <span class="collapse-next-btn">next</span> <span class="collapse-prev-btn">prev</span> 
      </li>
   </ul>
   <ul class="people-list row">
      <li class="person row">
         <div class="inner row">
            <div class="image"> <img src="images/peterHarthill.png" alt="peterHarthill" width="240" height="226"> </div>
            <div class="info"> <span class="name"><span>Peter</span> <span>Hartill</span></span> <span class="role">Chairman</span> <a data-content="inbox" class="expand-person" href="#pete4">Toggle more</a> </div>
         </div>
      </li>
      <li class="person row">
         <div class="inner row">
            <div class="image"> <img src="images/peterHarthill.png" alt="peterHarthill" width="240" height="226"> </div>
            <div class="info"> <span class="name"><span>Peter</span> <span>Hartill</span></span> <span class="role">Chairman</span> <a data-content="peter" class="expand-person" href="#pete5">Toggle more</a> </div>
         </div>
      </li>
      <li class="person row">
         <div class="inner row">
            <div class="image"> <img src="images/peterHarthill.png" alt="peterHarthill" width="240" height="226"> </div>
            <div class="info"> <span class="name"><span>Peter</span> <span>Hartill</span></span> <span class="role">Chairman</span> <a data-content="peter" class="expand-person" href="#pete6">Toggle more</a> </div>
         </div>
      </li>
   </ul>
   <ul class="expanded cd-tabs-content">
      <li  class="tab" id="pete4">
         <article class="expand row">
            <div class="info">
               <h1>Perter Hartill</h1>
               <h2>Chairman</h2>
               <p>Peter was a Senior Audit Partner with Deloitte, based in their Birmingham office, having retired on 31st May 2008.  Peter was with Deloitte for over 40 years based mainly in the Midlands but also spent time at their offices in London and Washington US.  During his career he acted for most of Deloitte's major Midlands clients and one of his specialist areas was the real estate sector.
                  Peter became Chairman of Deeley on 1st January 2009.
                  Peter is married with 2 step-children and enjoys golf and other sports. 
               </p>
            </div>
            <aside>
               <ul class="qualifications">
                  <li><strong>Qualifications</strong> Chartered Accountant</li>
                  <li><strong>Professional Affiliations</strong> FCA</li>
                  <li><strong>Start Date</strong> September 1988</li>
               </ul>
               <div class="share row">
                  <h2>Share</h2>
                  <ul>
                     <li><a href="#"><i class="fa fa-facebook" aria-hidden="true"></i></a></li>
                     <li><a href="#"><i class="fa fa-twitter fa-6" aria-hidden="true"></i></a></li>
                     <li class="linkedin"><a href="#"><i class="fa fa-linkedin" aria-hidden="true"></i></a></li>
                  </ul>
               </div>
            </aside>
         </article>
         <span class="collapse-btn">collapse</span> <span class="collapse-next-btn">next</span> <span class="collapse-prev-btn">prev</span> 
      </li>
      <li  class="tab" id="pete5">
         <article class="expand row">
            <div class="info">
               <h1>Perter Hartill</h1>
               <h2>Chairman</h2>
               <p>Peter was a Senior Audit Partner with Deloitte, based in their Birmingham office, having retired on 31st May 2008.  Peter was with Deloitte for over 40 years based mainly in the Midlands but also spent time at their offices in London and Washington US.  During his career he acted for most of Deloitte's major Midlands clients and one of his specialist areas was the real estate sector.
                  Peter became Chairman of Deeley on 1st January 2009.
                  Peter is married with 2 step-children and enjoys golf and other sports. 
               </p>
            </div>
            <aside>
               <ul class="qualifications">
                  <li><strong>Qualifications</strong> Chartered Accountant</li>
                  <li><strong>Professional Affiliations</strong> FCA</li>
                  <li><strong>Start Date</strong> September 1988</li>
               </ul>
               <div class="share row">
                  <h2>Share</h2>
                  <ul>
                     <li><a href="#"><i class="fa fa-facebook" aria-hidden="true"></i></a></li>
                     <li><a href="#"><i class="fa fa-twitter fa-6" aria-hidden="true"></i></a></li>
                     <li class="linkedin"><a href="#"><i class="fa fa-linkedin" aria-hidden="true"></i></a></li>
                  </ul>
               </div>
            </aside>
         </article>
      </li>
      <li  class="tab" id="pete6">
         <article class="expand row">
            <div class="info">
               <h1>Perter Hartill</h1>
               <h2>Chairman</h2>
               <p>Peter was a Senior Audit Partner with Deloitte, based in their Birmingham office, having retired on 31st May 2008.  Peter was with Deloitte for over 40 years based mainly in the Midlands but also spent time at their offices in London and Washington US.  During his career he acted for most of Deloitte's major Midlands clients and one of his specialist areas was the real estate sector.
                  Peter became Chairman of Deeley on 1st January 2009.
                  Peter is married with 2 step-children and enjoys golf and other sports. 
               </p>
            </div>
            <aside>
               <ul class="qualifications">
                  <li><strong>Qualifications</strong> Chartered Accountant</li>
                  <li><strong>Professional Affiliations</strong> FCA</li>
                  <li><strong>Start Date</strong> September 1988</li>
               </ul>
               <div class="share row">
                  <h2>Share</h2>
                  <ul>
                     <li><a href="#"><i class="fa fa-facebook" aria-hidden="true"></i></a></li>
                     <li><a href="#"><i class="fa fa-twitter fa-6" aria-hidden="true"></i></a></li>
                     <li class="linkedin"><a href="#"><i class="fa fa-linkedin" aria-hidden="true"></i></a></li>
                  </ul>
               </div>
            </aside>
         </article>
         <span class="collapse-btn">collapse</span> <span class="collapse-next-btn">next</span> <span class="collapse-prev-btn">prev</span> 
      </li>
   </ul>
</div>

当前 jQuery：

jQuery(document).ready(function() {
   jQuery('.people-grid a').on('click', function(e){
      var currentAttrValue = jQuery(this).attr('href');
      jQuery('.selected').removeClass('selected');
      jQuery(this).addClass('selected');
      // Show/Hide Tabs
      jQuery('.active').removeClass('active');
      jQuery('.people-grid ' + currentAttrValue).addClass('active');        
      e.preventDefault();
   });
   jQuery('.collapse-next-btn').on('click', function(e){        
      jQuery('.active').removeClass('active'); 
      jQuery(this).parent('.tab').next().addClass('active');
   });  
});

基本上是一个选项卡设置，但由于它的设计方式，它们必须被拆分。

我需要下一个和上一个按钮从当前 li.tab 中删除活动类并将其添加到下一个。我可以在同一个 ul 中执行此操作，但无法选择下一个 ul.expand 的下一个/上一个 li，当它到达当前列表的末尾/开头时。

然后我还需要突出显示带有"已选择"的相应按钮

开发站点可以在 http://deeley.devmode.co.uk/people.html 看到，因为我确定我可能没有多大意义！

如果有人能伸出援手，因为我整天都在兜圈子！