Php Framework for Rev based Development Strategy

[David Bovill]

I'm looking for a php framework that will allow a php based team to work
together with a Rev based team. The aim is to use revLets to rapidly
prototype interfaces, and when these are settled and tested where
appropriate replace these with AJAX / php based interfaces.

The legacy php project is a classic old-school mix of php and html - and I
figure the best way to get both development environments to play together is
to use an MVC / n-tier php framework where the GUI is distinct from the
backend layers - so that both revLet interfaces and html / AJAX interfaces
can call the same php backend.

Does anyone with php experience have any recommendations of frameworks or
strategies that would allow this type of rapid prototyping with revLet based
interfaces?