<ul class="nav navbar-nav navbar-right">
<li<?= $GLOBALS["action"] === "auth" ? ' class="active"' : '' ?>><a href="?_action=auth">Log in</a></li>
<?php if (REGISTRATION_ENABLED): ?>
<li<?= $GLOBALS["action"] === "register" ? ' class="active"' : '' ?>><a href="?_action=register">Register</a></li>
<?php endif; ?>
</ul>