JSFiddle - React, Tailwind, and code Playground

HTML

<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
    <link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.3/themes/ui-lightness/jquery-ui.css" type="text/css"></link>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.9.2/jquery-ui.js"></script>
<script>
$(document).ready(function(){
    $('.tabs').tabs();
    $('.subtabs').tabs({
        activate: function( event, ui ) {
            //get relative li index
            var secondTabSelected = $(ui.newTab).index();
            console.log(secondTabSelected);
        }
    });
});
</script>
</head>

<body>
<div class="tabs">
  <ul>
    <li><a href="#tabs-1">Tab 1</a></li>
    <li><a href="#tabs-2">Tab 2</a></li>
  </ul>
  <div id="tabs-1">
    <div class="subtabs">
      <ul>
        <li><a href="#tabs-1a">Tab 1-A</a></li>
        <li><a href="#tabs-1b">Tab 1-B</a></li>
      </ul>
      <div id="tabs-1a">
        <p>Tab 1A</p>
      </div>
      <div id="tabs-1b">
        <p>Tab 1B</p>
      </div>
    </div>
  </div>
  <div id="tabs-2">
    <div class="subtabs">
      <ul>
        <li><a href="#tabs-2a">Tab 2-A</a></li>
        <li><a href="#tabs-2b">Tab 2-B</a></li>
      </ul>
      <div id="tabs-2a">
        <p>Tab 2A</p>
      </div>
      <div id="tabs-2b">
        <p>Tab 2B</p>
      </div>
    </div>
  </div>
</div>
</body>