<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.1/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="container">
<div class="row">
<h2>Button Dropdown Select</h2><br>
<div class="bs-docs-example">
</div>
<select class="selectpicker" data-size="5" style="display: none;">
<option>Mustard</option>
<option>Ketchup</option>
<option>Relish</option>
<option>Mayonnaise</option>
<option>Barbecue Sauce</option>
<option>Salad Dressing</option>
<option>Tabasco</option>
<option>Salsa</option>
</select>
<select class="selectpicker">
<optgroup label="Picnic" disabled>
<option>Mustard</option>
<option>Ketchup</option>
<option>Relish</option>
</optgroup>
<optgroup label="Camping">
<option>Tent</option>
<option>Flashlight</option>
<option>Toilet Paper</option>
</optgroup>
</select>
<select class="selectpicker">