public function getData()
{
$provider = new CActiveDataProvider(SitemapPage::model()->active());
$data = [];
foreach (new CDataProviderIterator($provider) as $page) {
$data[] = ['location' => $page->url === '/' ? Yii::app()->getBaseUrl(true) : Yii::app()->getBaseUrl(true) . $page->url, 'changeFrequency' => $page->changefreq, 'priority' => $page->priority, 'lastModified' => null];
}
return $data;
}