드롭 다운 헤더

이 .dropdown-header클래스는 드롭 다운 메뉴에 헤더를 추가하는 데 사용됩니다.

예제
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container">
<h2>Dropdowns</h2>
<p>The .dropdown-header class is used to add headers inside the dropdown menu:</p>
<div class="dropdown">
<button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown">Tutorials
<span class="caret"></span></button>
<ul class="dropdown-menu">
<li class="dropdown-header">Dropdown header 1</li>
<li><a href="#">HTML</a></li>
<li><a href="#">CSS</a></li>
<li><a href="#">JavaScript</a></li>
<li class="divider"></li>
<li class="dropdown-header">Dropdown header 2</li>
<li><a href="#">About Us</a></li>
</ul>
</div>
</div>

</body>
</html>