simpledom

$simpledom = new SimpleDOM();
$simpledom
    ->element('ul', array('class' => 'menu'))
        ->element('li', array('id' => 'list_1'))
            ->element('a', array('href' => 'my_list_1.html'), 'Click Here')->up()
        ->up()
        ->element('li', array('id' => 'list_2'))
            ->text("free text")
            ->comment("my comment");

$domDocument = $simpledom->getDOMDocument();



echo $domDocument->saveHTML();

<ul class="menu">
    <li id="list_1">
        <a href="my_list_1.html">Click Here</a>
    </li>
    <li id="list_2">free text<!--my comment--></li>
</ul>