Wick
Wick is a library for CodeIgniter. It provides a method for loading and rendering one controller from within another controller. Some call it HMVC, some yell witchcraft and hunt you down with a pitchfork. Either way, it's free and released under the LGPL.
Download latest version of Wick
Installation is easy as pie: Unzip the package and upload the Wick.php file to your application/libraries folder.
Note: If you are running multiple applications from the same CodeIgniter installation which all use the library you may wish to upload the file to the system/libraries folder instead.
Aaand you're done!
First of all you will have to load the library. You can either load it manually in your controller constructor or choose to auto-load it instead.
To initialize the class manually in your controller constructor, use the $this->load->library function:
$this->load->library('Wick');
Once loaded, the controller loader will be available using: $this->wick->light
The first (and only) parameter is the segments that lead to the controller and method you wish to call. Segments can be a string or an array.
$this->wick->light('news/local/123');
This will call the requested controller and show any output it might give, before continuing execution of your current controller.