Try this PHP code:
<?php
require_once dirname(__FILE__) . "/simple_html_dom.php";
$url = "Your link here";
$htmlContent = str_get_html(file_get_contents($url));
foreach ($htmlContent->find("select[name='union'] option") as $element) {
$option = $element->plaintext;
$value = $element->getAttribute("value");
echo $option . ":" . $value . "<br>";
}
?>