The following code shows how to create Button group with icons.
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" type="text/css"
href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.0/css/bootstrap-combined.min.css">
<script type='text/javascript'
src="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" type="text/css"
href="http://netdna.bootstrapcdn.com/font-awesome/3.0.2/css/font-awesome.css">
</head><!--from w ww .ja v a2s . com-->
<body>
<p class="alert alert-warning">
Example of Button group with icons <i class="icon-arrow-down"></i>
</p>
<div class="btn-group">
<a class="btn" href="#">
<i class="icon-edit"></i></a>
<a class="btn" href="#">
<i class="icon-cut"></i></a>
<a class="btn" href="#">
<i class="icon-copy"></i></a>
<a class="btn" href="#">
<i class="icon-paste"></i></a>
</div>
</body>
</html>