Is there a way to run Phalcon without the php extention , like CakePhp , codeignighter ?
Sure, write a Zephir to PHP converter and translate the source of Phalcon :P
There was a project a while ago to make a raw PHP version of Phalcon. A quick Google didn't find it though, and I'm not sure if it would be updated for v2.
https://github.com/scento/phalcon-php