Please Check this may help
Config changes :- Go to application/config/config.php and enable or set hooks to true.
$config['enable_hooks'] = TRUE;create a new file named hooks.php in application/config/hooks.php and add below code in hooks.php:-
$hook['post_controller_constructor'][] = array( 'function' = 'redirect_ssl', 'filename' = 'ssl.php', 'filepath' = 'hooks' );Now create a new directory with named hooks under application directory and then create new file named ssl.php in application/hooks/ssl.php and add below code to ssl.php :-
function redirect_ssl() { $CI = get_instance(); $class = $CI-router-fetch_class(); $exclude = array('client'); // add more controller name to exclude ssl. if(!in_array($class,$exclude)) { // redirecting to ssl. $CI-config-config['base_url'] = str_replace('http://', 'https://', $CI-config-config['base_url']); if ($_SERVER['SERVER_PORT'] != 443) redirect($CI-uri-uri_string()); } else { // redirecting with no ssl. $CI-config-config['base_url'] = str_replace('https://', 'http://', $CI-config-config['base_url']); if ($_SERVER['SERVER_PORT'] == 443) redirect($CI-uri-uri_string()); }}