[eluser]Dam1an[/eluser]
You will need to include the Licence controller
Code:
include(APPPATH.'controllers.license.php)
You will (probably) have to then create an object for the License controller in order to call the methods (unless it's static)
Personally, I've never done that
Depending on the logic in the list function, it might be better suited as a library, so you can call it from anywhere, or if you need that function in several controllers, you could make the main controller extend the license controller