WordPress Menu: Collapsing Display Panes

Greetings,

WordPress: v4.0
Theme: X Theme

I’m looking for a way to get a link in my wordpress menu to toggle down a specific drop down pane. I can do this using the bellow code in the form of a link:

<a href="#" class="x-btn-widgetbar-alt collapsed" data-toggle="collapse" data-target=".x-widgetbar">Contact Us</a>

however, I’m really hoping for a way to be able make the Menu “Contact Us” link drop down a special contact us widget area instead of sending the viewer to a page.

is there any way of doing this without an additional plugins, and if not, is there a plugin that allows this/makes it possible?

Thank you,
Clovis