I want create a Typical Controller and extends all controller from it, but CI don't find

[eluser]Cro_Crx[/eluser]
You need to create a MY_Controller class which extends Controller. From there all classes will be able to extend it. You can't just write any class and hope that CI can find it as only the required controller is automatically loaded according to the filename. In your case CodeIgniter doesn't know where the FrontController class is when its looking to extend it.

Here's some more info: http://ellislab.com/codeigniter/user-gui...asses.html