/** * Return the opening markup for multiple navigation items * * @return string */ public function beginChildrenMarkup() { $cssClass = array(static::CSS_CLASS_NAV); if ($this->navigation->getLayout() === Navigation::LAYOUT_TABS) { $cssClass[] = static::CSS_CLASS_NAV_TABS; } elseif ($this->navigation->getLayout() === Navigation::LAYOUT_DROPDOWN) { $cssClass[] = static::CSS_CLASS_NAV_DROPDOWN; } return '<ul class="' . join(' ', $cssClass) . '">'; }