<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Bootstrap 3 scrollable dropdown</title>
<!-- See Scrollable Menu with Bootstrap 3 http://stackoverflow.com/questions/19227496 -->
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.js"></script>
<script src="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.js"></script>
<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.css">
<style>
.dropdown-menu {
width: 100%;
}
.scrollable-menu {
height: auto;
max-height: 200px;
overflow-x: hidden;
}
</style>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-lg-12">
<h2 class="bold">Scrollable Menu</h2>
<div class="btn-group">
<button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">
Scrollable Menu <span class="caret"></span>
</button>
<ul class="dropdown-menu scrollable-menu" role="menu">
<li><a href="#">Action 1</a></li>
<li><a href="#">Action 2</a></li>
<li><a href="#">Action 3</a></li>
<li><a href="#">Action 4</a></li>
<li><a href="#">Action 5</a></li>
<li><a href="#">Action 6</a></li>
<li><a href="#">Action 7</a></li>
<li><a href="#">Action 8</a></li>
<li><a href="#">Action 9</a></li>
<li><a href="#">Action 10</a></li>
<li><a href="#">Action 11</a></li>
<li><a href="#">Action 12</a></li>
<li><a href="#">Action 13</a></li>
<li><a href="#">Action 14</a></li>
<li><a href="#">Very very very very very very long action</a></li>
</ul>
</div>
<div class="btn-group">
<button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">
Non Scrollable Menu <span class="caret"></span>
</button>
<ul class="dropdown-menu" role="menu">
<li><a href="#">Action 1</a></li>
<li><a href="#">Action 2</a></li>
<li><a href="#">Action 3</a></li>
<li><a href="#">Action 4</a></li>
<li><a href="#">Action 5</a></li>
<li><a href="#">Action 6</a></li>
<li><a href="#">Action 7</a></li>
<li><a href="#">Action 8</a></li>
<li><a href="#">Action 9</a></li>
<li><a href="#">Action 10</a></li>
<li><a href="#">Action 11</a></li>
<li><a href="#">Action 12</a></li>
<li><a href="#">Action 13</a></li>
<li><a href="#">Action 14</a></li>
<li><a href="#">Very very very very very very long action</a></li>
</ul>
</div>
</div>
</div>
</div>
</body>
</html>