Can I have more management on my controller by separate functions into classes?

 created a simple "CMS" with "codeigniter".
I want to know can it separates public functions into a new class?
This is my controller code:

PHP Code:

class Admin extends MY_Controller {
    public function __construct(){}
    
    // ---- POST ----
    public function addPost(){}
    public function editPost(){}
    public function deletePost(){}
    public function managePosts(){}
    
    // ---- CATEGORY ----
    public function addCategory(){}
    public function editCategory(){}
    ...
}