Sharing controllers, models and views between separate projects in CodeIgniter

Kohana, due to cascading file system and modules, allows to share code in common proje开发者_如何学Pythoncts, that contains controllers, views and models directories. How can I do it in codeigniter? I want to create sites, that will share some code (admin area views, some models). That is easy in Kohana, we just have to add another directory for Kohana::find_file().

I think this is a duplication of:

Codeigniter Shared Resources - Opinions Wanted

And

How do I load a view from a specific (shared) path in CodeIgniter?

I'm more experienced in Kohana than CI but if I'm right there is a HMVC module in CodeIgniter. You could see if you are able to request a external page like you can with the HMVC of kohana.

If I may ask. why do you use codeigniter when you know kohana does the job better?