Как вывести html данные?

foreach ($matches as $item) {
      $element = $this->itemObjectInfo($item['id']);
      echo '<h1>' + $element['title'] . '</h1>';
}

<?php foreach ($matches as $item): ?>
    <ul>
        <li>
            <?=$this->itemObjectInfo($item['id'])?>
        </li>
    </ul>
<?php endforeach; ?>