UML TOOL for Codeigniter Projects

[eluser]Eric Cope[/eluser]
I recently saw a discussion on Slashdot regarding code documentation. Several posters felt that self documenting code was better than UML. This begs the question, what are your true needs? Can something else better meet those needs? I have seen some self documenting code (CI has it) that is pretty handy and easier to understand than some flow charts.

Just trying to think outside the box. It may or may not apply to you.