how to create admin panel in codeigniter

[eluser]Unknown[/eluser]
Hi all codeigniterians

I am new in codeigniter , i am trying to make admin panel in codeigniter but i could not get it. i have tried to follow this way create admin panel in codeigniter . i use 2nd way to create admin directories in controller and views but did not access the admin pages.

i had tried with change in routing config/routes.php

$route['^admin/([a-zA-Z_-]+)/(:any)'] = "admin/$1";

please help me how to create it