<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<div class="container">
<h2>Simple Collapsible</h2>
<a href="#demo" class="btn btn-info" data-toggle="collapse">Simple collapsible</a>
<div id="demo" class="collapse">
<div class="form-group label-floating">
hello Word hello Word hello Word hello Word hello Word
hello Word hello Word hello Word hello Word hello Word
hello Word hello Word hello Word hello Word hello Word
</div>
</div>