Multi-level Controller - codeigniter

Question

i have problem with viewing page within sub-subfolder. when i access the url it says page not found.
The url i used to access is localhost/amc/program/admin/user
Here is the folder structure i have:
controller
-program
--admin
user.php
core
-program
--admin
admin_controller.php
models
-program
--admin
user_model.php
views
-program
--admin
user_list.php
And here's the controller code
<?php
class User extends Admin_Controller
{
public $data = array(
'halaman' => 'user',
'main_view' => 'program/admin/user_list',
'title' => 'Data User',
);
public function __construct()
{
parent::__construct();
$this->load->model('program/admin/User_model', 'user_model');
}
public function index()
{
$user = $this->user_model->get_all_user_data();
if ($user) {
$this->data['userData'] = $user;
} else {
$this->data['userData'] = 'Tidak ada data user.';
}
$this->load->view($this->layout, $this->data);
}
}
thank's for your attention guys

Answer 1

I just found out that CI doesnt support multi-level sub-folder controller, but there's work around that enable us to do that.
I found this code that enable multi-level sub-folder controller:
multi-level controller
credit: https://github.com/ollierattue/codeigniter-multi-level-controller-extension/blob/master/core/MY_Router.php