wordpress-menus like multi-level menus

Question

You must know WP 3's multi-level menu configuration feature on the dashboard.

I was wondering how WordPress is doing that. Yes, I know they are using jQuery UI. But still, how? Is there any documentation?

Or is there any plugin or anything that shall help me?

Thank you all.

Answer 1

Nestable

Drag & drop hierarchical list with mouse and touch compatibility (jQuery plugin)

http://dbushell.github.com/Nestable/

Answer 2

I used Nestable jQuery plugin to accomplish it, but I forked it to add some extra features (Add/Delete/Edit actions and Slug property):

https://github.com/FrancescoBorzi/Nestable