This is the codepen example.
<div class="row">
<div class="col s12">
<ul class="tabs2">
<li class="tab col s3"><a href="#test1">Test 1</a></li>
<li class="tab col s3"><a class="active" href="#test2">Test 2</a></li>
<li class="tab col s3 disabled"><a href="#test3">Disabled Tab</a></li>
<li class="tab col s3"><a href="#test4">Test 4</a></li>
</ul>
</div>
<div id="test1" class="col s12">Test 1</div>
<div id="test2" class="col s12">
<div class="row">
<div class="col s12">
<ul class="tabs">
<li class="tab col s3"><a href="#test1">Test 1</a></li>
<li class="tab col s3"><a class="active" href="#test2">Test 2</a></li>
<li class="tab col s3 disabled"><a href="#test3">Disabled Tab</a></li>
<li class="tab col s3"><a href="#test4">Test 4</a></li>
</ul>
</div>
<div id="test1" class="col s12">Test 1</div>
<div id="test2" class="col s12">Test 2</div>
<div id="test3" class="col s12">Test 3</div>
<div id="test4" class="col s12">Test 4</div>
</div>
</div>
<div id="test3" class="col s12">Test 3</div>
<div id="test4" class="col s12">Test 4</div>
</div>
$(document).ready(function(){
$('ul.tabs2').tabs();
$('ul.tabs').tabs();
});
It uses the materialize framework combined with jQuery. Unsure of what modifications are needed to resolve any issues.
Nested tabs functionality demonstrated here.