JSFiddle - React, Tailwind, and code Playground

HTML

<div class="buttons">
<a  id="showall">All</a>
<a  class="showSingle" target="1">Div 1</a>
<a  class="showSingle selected" target="2">Div 2</a>
<a  class="showSingle" target="3">Div 3</a>
<a  class="showSingle" target="4">Div 4</a>
</div>

<div id="div1" class="targetDiv">
    <a href="#" class="button3">1a</a>
    <a href="#" class="button3">1b</a>
</div>

<div id="div2" class="targetDiv">
    <a href="#" class="button3">2a</a>
    <a href="#" class="button3">2b</a>
</div>
<div id="div3" class="targetDiv">
        <a href="#" class="button3">3a</a>
        <a href="#" class="button3">3b</a>
</div>
<div id="div4" class="targetDiv">popup COMPLETE</div>

CSS

.selected {background:red;}

JavaScript

jQuery(function(){
         //jQuery('#showall').click(function(){
          //     jQuery('.targetDiv').show();
        //});
        jQuery('.showSingle').click(function(){
              jQuery('.targetDiv').hide();
              jQuery('#div'+$(this).attr('target')).show();
        });
});