$action = 'action_';

$action .= isset( $_GET['act'] )?$_GET['act']:'index';

if ( isset($_GET['c']) ) {

	switch($_GET['c']) {

		case 'articles':

			$controller = new C_Articles();

			break;

		case 'users':

			$controller = new C_Users();

			break;

	}

} else {

	$controller = new C_Articles();

}

$controller->$action();