The collapse plugin is also known as an "accordion" plugin on the Web.
Accordion houses multiple vertically stacked tabs, but can open only one tab at a time.
In Bootstrap, a Accordion is created by housing multiple panel components together in a single container.
A panel has two components: the panel-heading and panel-body.
To create a collapse, we need a group of panels contained inside a container.
This container is created using a div element with the class panel-group.
It should also have an ID associated with it.
<div class="panel-group" id="accordion"></div>
<!DOCTYPE html>
<html lang="en">
<head>
<script type='text/javascript'
src="http://code.jquery.com/jquery-1.10.1.min.js"></script>
<link rel="stylesheet"
href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<link rel="stylesheet"
href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap-theme.min.css">
<script
src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script
src="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
</head><!--from w w w . ja va 2 s.co m-->
<body style='margin:30px'>
<div class="panel-group" id="accordion">
<!-- Panel 1 -->
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a data-toggle="collapse" data-parent="#accordion" href="#collapseOne">
Collapsible Group Item #1
</a>
</h4>
</div>
<div id="collapseOne" class="panel-collapse collapse in">
<div class="panel-body">
Lorem ipsum dolor sit amet, consectetur ...
</div>
</div>
</div>
<!-- Panel 2 -->
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a data-toggle="collapse" data-parent="#accordion"
href="#collapseTwo">
Collapsible Group Item #2
</a>
</h4>
</div>
<div id="collapseTwo" class="panel-collapse collapse">
<div class="panel-body">
Lorem ipsum dolor sit amet, consectetur ...
</div>
</div>
</div>
<!-- Panel 3 -->
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title">
<a data-toggle="collapse" data-parent="#accordion"
href="#collapseThree">
Collapsible Group Item #3
</a>
</h4>
</div>
<div id="collapseThree" class="panel-collapse collapse">
<div class="panel-body">
Lorem ipsum dolor sit amet, consectetur ...
</div>
</div>
</div>
</div>
</body>
</html>