public function dsLinhVuc()
{
$bizLinhVuc = new Default_Model_LinhVuc();
$result = array();
$result = $bizLinhVuc->getAll();
$link = new Zend_View_Helper_Url();
$str = '<ul>';
foreach ($result as $linh_vuc) {
$url = $link->url(array('controller' => 'de-tai', 'action' => 'danh-sach', 'catid' => $linh_vuc['id']), null, true);
$str .= '<li><a class="Normal" href="' . $url . '" target="_self">' . $linh_vuc['ten'] . '</a></li>';
}
$str .= '</ul>';
return $str;
}
