Two of the dynamic programs I work with, ModX and WordPress, allow you to create a site structure pretty much exactly like what you have, if you're clever.

You can also just do your pages using php includes and use the .htaccess trick. I use it on the few static pages I have (which run php but are extension .htm)

__________________
Custom WordPress Themes, CubeCart templates, ModX templates, Movable Type templates. ~ B1tchslappin Political Blog ~ GreenSpeak Community Action