protected function liefhierarchy_parse_options(array $options) {
		foreach ($options as $key => $label) {
			if (is_array($label)) {
				$option = \ran\HTMLTag::i($this->confs, 'option', $key)
					->set('disabled', '');

				$this->appendtagbody($option->render());
				$this->liefhierarchy_parse_options($label);
			}
			else { # $value not array
				$option = \ran\HTMLTag::i($this->confs, 'option', $label)
					->set('value', $key);

				if ($this->values !== null && in_array(strval($key), $this->values, false)) {
					$option->set('selected', '');
				}

				$this->appendtagbody($option->render());
			}
		}
	}