static function rewrite_rules_filter($value)
 {
     global $wpdb, $sitepress;
     if (empty($value)) {
         return $value;
     } else {
         $rewrite_rule_filter = new WPML_Rewrite_Rule_Filter($wpdb, $sitepress);
         return $rewrite_rule_filter->rewrite_rules_filter($value);
     }
 }
 static function rewrite_rules_filter($value)
 {
     global $wpdb, $sitepress;
     $rewrite_rule_filter = new WPML_Rewrite_Rule_Filter($wpdb, $sitepress);
     return $rewrite_rule_filter->rewrite_rules_filter($value);
 }