aMember (site.php): Make chosen Link item active in user menu

site.php

<?php

Am_Di::getInstance()->hook->add(Am_Event::USER_MENU, function(Am_Event $e) {
    $menu = $e->getMenu();
    $url = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);

    if ($_ = $e->getDi()->linkTable->findFirstByUrl($url)) {
        $menu->findOneById("link-{$_->pk()}")->setActive(true);
    }
});