We've been using for long time web development frameworks based on PHP libraries (CakePHP, Symphony, Zend). Besides the MVC aspects of our applications we must implement now a parallel content provisioning system with the most advanced possible editing functionality, as a CMS provides. Our constraints would be that the "web-framework-CMS" to be opensource and to exclusively generate HTML-CSS-JS-PHP code (no intermediate code) that can be directly interpreted by a browser when the application is executed. Some of the CMSs we've looked at are using their proprietary set of instructions which are HTML translated by the CMS engine at run time. In other words, except for the provisioning or object creation phase we'd like that the CMS don't intervene.
What is your expert opinion about such an existing solution?
Drupal, written in PHP, is often used as a framework for non-content uses.