public function index()
 {
     $types = Access_token::$types_with_tools;
     $configs = Config::findAll()->all_to_array();
     $available_configs = array();
     foreach ($types as $type) {
         foreach ($configs as $config) {
             $available_config = Available_config::create()->where('type', $type)->where('config_id', $config['id'])->get(1);
             $config['is_enable'] = $available_config->exists() ? true : false;
             $available_configs[$type][$config['id']] = $config;
         }
     }
     $post = $this->input->post();
     if (!empty($post)) {
         $old_available_configs = Available_config::findAll();
         foreach ($old_available_configs as $old_available_config) {
             $old_available_config->delete();
         }
         foreach ($post as $_type => $configs) {
             foreach ($configs as $config_id => $value) {
                 $new_available_config = Available_config::create();
                 $new_available_config->type = $_type;
                 $new_available_config->config_id = $config_id;
                 $new_available_config->save();
             }
         }
         $this->addFlash(lang('social_update_success'), 'success');
         redirect('admin/social_settings');
     }
     $this->template->set('available_configs', $available_configs);
     $this->template->render();
 }