tree navigation in php

Greets all - I'm having some trouble setting what I feel is pretty basic navigation for my site mainly because I don't fully comprehend object classes. I'm building a navigation similar to what's found at http://phpwizard.net. I have working DHTML menus but need some form of supplemental navigation for non-JS browsers. I've been working with the tree class found at http://phpwizard.net/ which is a php4 modified version of the tree class from phplib. Using the examples from phplib I've done some experiments with the modified tree class. My problem is I don't quite see how to turn it's raw output into a navigation box. I'm not seeing how to grab individual elements of the array inside my own output function, I think. Any pointers to php navigation scripts or assistance with the tree class would be much appreciated. -- Scott