Mohsin Rasool

This plugin adds [collapse_group] and [collapse] shortcode to generate twitter bootstrap’s collapse aka accordian.
Usage:
<pre><code>[collapse_group id="optional_group_1" class="optional_class"]
 [collapse title="my heading1" id="optional_id" open="y/n"]some text[/collapse]
 [collapse title="my heading2" id="optional_id" open="y/n"]some text[/collapse]
[/collapse_group]
</code></pre>
See output of this code in Screenshots

Twitter Bootstrap Collapse aka Accordian Shortcode

This plugin adds [collapse_group] and [collapse] shortcode to generate twitter bootstrap's collapse aka accordian.

sevenspark

Bellows is an awesome accordion menu for WordPress. It works with the WordPress menu system to allow you to build beautiful accordion menus for your site.
<a href="https://wpaccordionmenu.com/free/" rel="nofollow ugc">Bellows Lite Demo</a> 
<a href="https://wpaccordionmenu.com/" rel="nofollow ugc">Bellows Full Demo</a>
Get started: <a href="http://sevenspark.com/docs/bellows/quick-start/lite" rel="nofollow ugc">Bellows Quick Start Guide</a>
<h4>Feature Overview</h4>
<ul>
<li>Fully functional accordion menu</li>
<li>Multiple submenu levels</li>
<li>3 included skin presets</li>
<li>Multi- or single-folding</li>
<li>Expand current submenu automatically option</li>
<li>Shortcode integration – add an accodion menu to yoru site anywhere you can add shortcodes</li>
<li>Widget integration – add an accordion menu to your widgetized theme areas</li>
</ul>

Bellows Accordion Menu

A flexible and robust accordion menu plugin

Twitter Bootstrap Collapse aka Accordian Shortcode vs Bellows Accordion Menu