External Cron Job with CI

[eluser]marcoslavorato[/eluser]
Hello friends. I have a job developed with CI and it's amazing. i have Cron Job that need to execute some page in my site. The problem is the Cron Job need the path with the file.php, and with my .htacess rule I eliminate that. How can I call some page and use all the process of MVC?

Thanks,
Marcos