<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>
<div class="col-md-3">
<div class="well" style="padding: 8px;">
<ul class="nav nav-list">
<li>
<label class="tree-toggler nav-header">
<b>
Guest
</b>
</label>
<ul class="nav nav-list tree" style="display: block;">
<li>
<a href="#">
Log IN
</a>
</li>
<li>
<a href="#">
Register
</a>
</li>
<li>
<label class="tree-toggler nav-header">
<b>
section
</b>
</label>
<ul class="nav nav-list tree">
<li>
<a href="#">
Test
</a>
</li>