<?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());

    }

}
?>