$dom_document = new DOMDocument();
$html = mb_convert_encoding($html, 'HTML-ENTITIES', "UTF-8");
$dom_document->loadHTML($html);
$dom_xpath = new DOMXpath($dom_document);
$options = $dom_xpath->query("*/select[@name='jform[firma_z_katalogu]']/option");
foreach ($options as $option) {
if($option->getAttribute('value') == $firmaId) {
$firmaZKatalogu = '<select id="jform_firma_z_katalogu" name="jform[firma_z_katalogu]">'
.'<option value="'.$firmaId.'" >'.$option->nodeValue.'</option>'
.'</select>';
}
}