preg_match_all("/\{\{[a-z0-9]{1}([a-z0-9\_]*[a-z0-9]{1})?\}\}/", $content_new, $custom_attrs);
                                if(count($custom_attrs[0]) > 0){
                                    foreach($custom_attrs[0] as $custom_attr){
                                        $custom_attr_trim = trim($custom_attr,"\}\{");
                                        $mdb->select("contacts_attr_options.value");
                                        $mdb->from("contacts_attr");
                                        $mdb->join("contacts_attr_options", "contacts_attr_options.attr_id = contacts_attr.id");
                                        $mdb->where("contacts_attr.code", $custom_attr_trim);
                                        $mdb->where("contacts_attr_options.contacts_id", $row_info->id);
                                        $query_attr = $mdb->get();
                                        if($query_attr->num_rows() > 0){
                                            $row_attr = $query_attr->last_row();
                                            $content_new = str_replace($custom_attr, $row_attr->value, $content_new);
                                        }else{
                                            $mdb->select("*");
                                            $mdb->from("contacts_attr");
                                            $mdb->where("code", $custom_attr_trim);
                                            $query_attr = $mdb->get();
                                            if($query_attr->num_rows() > 0){
                                                $row_attr = $query_attr->last_row();
                                                $content_new = str_replace($custom_attr, $row_attr->default_value, $content_new);
                                            }else{
                                                if(isset($row_info_arr[$custom_attr_trim])){
                                                    $content_new = str_replace($custom_attr, $row_info_arr[$custom_attr_trim], $content_new);
                                                }
                                            }
                                        }
                                    }
                                }
                                $content_new = str_replace(
                                    array(
                                        "{{firstname}}",
                                        "{{lastname}}",
                                        "{{email}}"
                                    ),
                                    array(
                                        $row_info->firstname,
                                        $row_info->lastname,
                                        $row_info->email
                                    ),
                                    $content_new
                                );