<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 ---------->
<nav class="navbar navbar-default">
<div class="container-fluid">
<ul class="nav navbar-nav">
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Header test <span class="caret"></span></a>
<ul class="dropdown-menu">
<li class="header">Plain background</li>
<li><a href="#">Normal item</a></li>
<li><a href="#">Normal item</a></li>
<li class="header bg-primary">.bg-primary background</li>
<li><a href="#">Normal item</a></li>
<li><a href="#"><span class="glyphicon glyphicon-pencil"></span> With a glyph</a></li>
<li class="header bg-info">.bg-info background</li>
<li><a href="#"><span class="glyphicon glyphicon-pencil"></span> With a glyphm</a></li>
<li class="header bg-success">.bg-success background</li>
<li><a href="#">Normal item</a></li>
<li class="header bg-warning">.bg-warning background</li>
<li><a href="#">Normal item</a></li>
<li class="header bg-danger">.bg-danger background</li>
<li><a href="#">Normal item</a></li>
</ul>
</li>
</ul>
</div>
</nav>
Using the <a href="http://getbootstrap.com/css/#helper-classes-backgrounds">Bootstrap Contextual background</a> classes on the <li> allows for a more versatile use of the headers.<br />
If you want the dropdown to stay open when a header is clicked, include the JS code.