Example of the code that can be used to bring the same functionality from the Model/CI_Model of CodeIgniter to other classes that want to access CodeIgniter fields as if they were attached to the class itself

CI_attribute.php

/**
 * __get
 *
 * Allows models to access CI's loaded classes using the same
 * syntax as controllers.
 *
 * @param	string
 * @access private
 */
function __get($key)
{
	$CI =& get_instance();
	return $CI->$key;
}