CodeIgniter can be told to load a default controller when a URI is not present, as will be the case when only your site root URL is requested. To specify a default controller, open your application/config/routes.php file and set this variable:
$route['default_controller'] = 'blog';Where ‘blog’ is the name of the controller class you want used. If you now load your main index.php file without specifying any URI segments you’ll see your “Hello World??? message by default.