/**
@brief Open the tag.
@since 2015-12-27 14:10:46
**/
public function open_tag()
{
$this->css_class('nav-tab');
if ($this->current) {
$this->css_class('nav-tab-active');
}
$this->set_attribute('href', $this->url);
$this->title($this->title);
return parent::open_tag();
}