$texto = "ta ta ta ta ta ";
<?php
$patron = '/<a[^>]*>(.(?!a>))*<h[32]>.*<\/h[32]>.*<\/a>/isU'; //|<a.*>.*<h3>(.*)<\/h3>.*<\/a> // [^(<\/a>)]+
//$patron = '/<a name="(.*)">(.*)<\/a>/isU';
preg_match_all($patron, $texto, $subtitle, PREG_SET_ORDER);
for($i=0;$i<count($subtitle);$i++){
if (isset($subtitle[$i][0])){
$subtitulos[] = strip_tags(trim($subtitle[$i][0]), "<a>");
}
};
?>
<div id="submenu" class="menu">
<?php
if(isset($subtitulos)){
echo "<ul>"."\r";
$subtitulos = array_values(array_diff($subtitulos, array('')));
for($i=0;$i<count($subtitulos);$i++){
echo "<li>$subtitulos[$i]</li>"."\r";
};
echo "</ul>"."\r";
}
?>
</div>