The following code shows how to toggle All Collapse.
<!DOCTYPE html>
<html>
<head>
<script type='text/javascript'
src='http://code.jquery.com/jquery-1.10.1.js'></script>
<link rel="stylesheet" type="text/css"
href="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
<script type='text/javascript'
src="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
<script type='text/javascript'>
$(window).load(function(){<!--from w w w . j a va 2s. c o m-->
$('#accordion .panel-default').on('click', function () {
$('#accordion .panel-collapse').collapse('toggle');
});
});
</script>
</head>
<body style='margin:30px'>
<div class="panel-group" id="accordion">
<!-- First Panel -->
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title" data-toggle="collapse"
data-target="#collapseOne">Collapsible Group Item #1</h4>
</div>
<div id="collapseOne" class="panel-collapse collapse">
<div class="panel-body">Anim pariatur cliche reprehenderit,
enim eiusmod high life accusamus terry richardson ad squid.</div>
</div>
</div>
<!-- Second Panel -->
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title" data-toggle="collapse"
data-target="#collapseTwo">Collapsible Group Item #2</h4>
</div>
<div id="collapseTwo" class="panel-collapse collapse">
<div class="panel-body">Anim pariatur cliche reprehenderit,
enim eiusmod high life accusamus terry richardson ad squid.</div>
</div>
</div>
<!-- Third Panel -->
<div class="panel panel-default">
<div class="panel-heading">
<h4 class="panel-title" data-toggle="collapse"
data-target="#collapseThree">Collapsible Group Item #3</h4>
</div>
<div id="collapseThree" class="panel-collapse collapse">
<div class="panel-body">Anim pariatur cliche reprehenderit,
enim eiusmod high life accusamus terry richardson ad squid.</div>
</div>
</div>
</div>
</body>
</html>