Creating a simplified PHP interface

I’m interested in putting together a simplified FreePBX interface that omits many of the more advanced options and has an easier to understand menu structure for less technical users. It would basically involve creating a new template for FreePBX but keeping the same functions under the hood. I was wondering if anything like this has been done before and there are other projects I could look at as examples. Has anyone done much alteration of the graphical frontend? Thanks for any help.