Twitter Bootstrap 3 and responsive panel-menu

HTML

<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css">
<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap-theme.min.css">
<script src="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<hr> 

<div id="my-menu" class="panel panel-default collapse">
    <div class="panel-heading">My Menu</div>
    <div class="panel-body">
	<div class="row">
	    <div class="col-xs-2"><img src="http://placeimg.com/128/128/tech" class="img-responsive"><p>Stuff</p></div>
	    <div class="col-xs-2"><img src="http://placeimg.com/128/128/tech" class="img-responsive"><p>Stuff</p></div>
	    <div class="col-xs-2"><img src="http://placeimg.com/128/128/tech" class="img-responsive"><p>Stuff</p></div>
	    <div class="col-xs-2"><img src="http://placeimg.com/128/128/tech" class="img-responsive"><p>Stuff</p></div>
	    <div class="col-xs-2"><img src="http://placeimg.com/128/128/tech" class="img-responsive"><p>Stuff</p></div>
	    <div class="col-xs-2"><img src="http://placeimg.com/128/128/tech" class="img-responsive"><p>Stuff</p></div>
	</div>
	<div class="row">
	    <div class="col-xs-2"><img src="http://placeimg.com/128/128/tech" class="img-responsive"><p>Stuff</p></div>
	    <div class="col-xs-2"><img src="http://placeimg.com/128/128/tech" class="img-responsive"><p>Stuff</p></div>
	    <div class="col-xs-2"><img src="http://placeimg.com/128/128/tech" class="img-responsive"><p>Stuff</p></div>
	    <div class="col-xs-2"><img src="http://placeimg.com/128/128/tech" class="img-responsive"><p>Stuff</p></div>
	    <div class="col-xs-2"><img src="http://placeimg.com/128/128/tech" class="img-responsive"><p>Stuff</p></div>
	    <div class="col-xs-2"><img src="http://placeimg.com/128/128/tech" class="img-responsive"><p>Stuff</p></div>
	</div>
    </div>
</div>
            <button type="button" class="btn btn-default" data-toggle="collapse" data-target="#my-menu">Action <span...