Plugin to close/fold menus like Dropdown effect

Hey guys, looking for a plugin that can close/fold like dropdown effect at the siedebar.

Basiclly I need something like this:
http://www.designchemical.com/lab/demo-wordpress-vertical-accordion-menu-plugin/#

http://wordpress.org/extend/plugins/jquery-vertical-accordion-menu/

But not sure why, I can not manage this plugin to work properlly.

Any chance to have a plugin that can do what I need?

Thanks in advance.

Meu site:
http://www.tocadodragao.com