<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="row">
<div class="col-md-3">
<div class="panel-group panel-group" id="accordion2Primary">
<div class="left-panel"><h4>API Product</h4>
<div class="panel-heading">
<p class="panel-title">
<a class="accordion-toggle collapsed" data-toggle="collapse" data-parent="#accordion2Primary" href="#collapse2api1" aria-expanded="false">
Accordion
</a>
</p>
</div>
<div id="collapse2api1" class="accordion-body collapse" aria-expanded="false" style="height: 0px;">
<div class="panel-body">
<p>Donec tellus massa, tristique sit amet condimentum vel, facilisis quis sapien.</p>
</div>
</div>
</div>
<div >
<div class="panel-heading">
<p class="panel-title">
<a class="accordion-toggle collapsed" data-toggle="collapse" data-parent="#accordion2Primary" href="#collapse2api2" aria-expanded="false">
Accordion Title 2
</a>
</p>
</div>
<div id="collapse2api2" class="accordion-body collapse" aria-expanded="false">
<div class="panel-body">
<p>Donec tellus massa, tristique sit amet condimentum vel, facilisis quis sapien.</p>
</div>
</div>
</div>
<div >
