$route['default_controller'] = "home";
$route['(:any)'] = 'home/$1'; // http://example.com/any
$route['load/(:any)'] = 'home/load/$1'; // http://example.com/load/any
$route['student'] = 'student'; // http://example.com/student
$route['student/(:num)'] = 'student/profile/$1'; // http://example.com/student/1234
$route['admin'] = 'admin'; // http://example.com/admin
$route['admin/(:any)'] = 'admin/$1'; // http://example.com/admin/any