function register_mysettings_facebookpixel() { //register our settings register_setting('fbkPixel-settings-group', 'fbk_pixel_id'); register_setting('fbkPixel-settings-group', 'fbk_pixel_currency'); register_setting('fbkPixel-custom-settings-group', 'fbk_pixel_custom_id'); $helper = new HelperPixel(); $audienceOptions = $helper->getAudienceOptions(); foreach ($audienceOptions as $option) { register_setting('fbkPixel-custom-settings-group', 'fbk_pixel_custom_option_' . $option); } }