Looking for codeiginter MPTT class

[eluser]JoostV[/eluser]
Any Codeigniters who know of a good Codeigniter MPTT tree traversal class?

I need to 'spice up' my CI CMS with categories that can have an unlimited number of subcategories.

My goals are to create:
- an admin page to add a category and choose its parent category
- an admin page in which you can drag the categories in order to change their position.
- a front end view that displays the categories and their subcategories as an unordered list.

EDIT* MPTT as in http://articles.sitepoint.com/article/hi...a-database

[eluser]Thorpe Obazee[/eluser]
Here's a MPTT class I've seen around here: MPTTree

[eluser]JoostV[/eluser]
Looking through the manual now, and it looks great! Exactly what I need, thanks! Can't believe I haven't spotted this before %-P