This plugin adds [collapse_group] and [collapse] shortcode to generate twitter bootstrap’s collapse aka accordian.
Usage:
[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]
See output of this code in Screenshots
This plugin is available for download to be used on your WordPress self-hosted installation.