I'm looking for something to rapidly build rich graphical web interfaces.
The thing is, in order to have a rich UI in the browser, you either need third party plugins like Flash or Silverlight or use the traditional combination of HTML, CSS and a whole lot of JavaScript, because that is how the behavior and Ajax capabilities get into the UI components of a RIA. A serverside framework capable of creating a rich UI would have to know how to create all this. Frameworks like this do exist (GWT comes to mind), but there is no dedicated framework for this in the PHP world (at least not to my knowledge).
The notable PHP frameworks all offer rapid application development out of the box. Some of them, like Cake, Symfony and ZF (don't know about CI) even offer make-like tools to create controllers, models and view scripts through code generation, speeding up development time even more. Feature-wise, there is very little you will miss in any of them. However, none of them give you rich UIs like that of ExtJS, Dojo or jQueryUI (to name some JS framewoks) out of the box.
The three closest things to what you are looking for would be to
In addition, there is frameworks like PRADO which use their own templating language to create rich components or framework that use XUL to use the browser's native UI components. I'd categorize them as, well.. not so common.