Extending CI_Loader - how to access CI Models?

[eluser]Sam Granger[/eluser]
I want visitors on mobile phones to see a different view "theme" - currently have a getTheme function in a Model named Theme. This function checks agent->is_mobile and from there it returns which folder the controller should load its views from ($this->load->view($this->theme->getTheme() . 'view_file'))

I was wondering if I could just override the view function with this functionality - not sure what the best solution would be in this case?