$value = $value ? $value : $this->get_default_value($field['setting']['option']['value']);
            $value = dr_string2array($value);
            if (is_array($value)) {
                $new = [];
                foreach ($value as $t) {
                    $new[] = (string)$t;
                }
                $value = json_encode($new);
            } else {
                $value = '[]';
            }