// Let's make sure we have some resources before we start
if ( $resources ) {
    ?>
    <ul class="extra-resources">
    <?php
    foreach ( $resources as $link ) {
        ?>
        <li><a href="<?php echo esc_url( $link ); ?>"><?php echo esc_html( $link ); ?></a></li>
        <?php
    }
    ?>
    </ul>
    <?php
}