<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h2>Nesting Button Groups</h2>
<p>Nest button groups to create drop down menus:</p>
<div class="btn-group">
<button type="button" class="btn btn-primary">Apple</button>
<button type="button" class="btn btn-primary">Samsung</button>
<div class="btn-group">
<button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown">
Sony <span class="caret"></span></button>
<ul class="dropdown-menu" role="menu">
<li><a href="tryit.asp-filename=trybs_button_group_dropdown&stacked=h.html#">Tablet</a></li>
<li><a href="tryit.asp-filename=trybs_button_group_dropdown&stacked=h.html#">Smartphone</a></li>
</ul>
</div>
</div>
</div>
</body>
</html>