Bootstrap Collapse - Toggle All

By clicking on one heading, all target blocks toggle.

HTML

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="//http://netdna.bootstrapcdn.com/font-awesome/3.2.1/css/font-awesome.min.css">
<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>

CSS

.panel-title:hover {
     cursor: pointer;
}

JavaScript

$('#open').on('click', function () {
    $('#accordion .panel-collapse').collapse('toggle');
});