gistfile1.php

<?php
$dom = new DOMDocument();
// cache of the wikipedia page
$dom->loadHTML(file_get_contents('abe.vigoda_cache.html'));

foreach($dom->getElementById('persondata')->getElementsByTagName("tr") as $row) {
    foreach($row->childNodes as $node) {
        if( $node->hasAttribute('class') ) {
            var_dump($dom->saveXML($node));
        }
    }
}

/* example persondata:
<table id="persondata" class="persondata" style="border:1px solid #aaa; display:none; speak:none;">
<tr>
<th colspan="2"><a href="/wiki/Wikipedia:Persondata" title="Wikipedia:Persondata">Persondata</a></th>
</tr>
<tr>
<td class="persondata-label" style="color:#aaa;">Name</td>
<td>Vigoda, Abe</td>
</tr>
<tr>
<td class="persondata-label" style="color:#aaa;">Alternative names</td>
<td></td>
</tr>
<tr>
<td class="persondata-label" style="color:#aaa;">Short description</td>
<td><a href="/wiki/United_States" title="United States">American</a> <a href="/wiki/Actor" title="Actor">actor</a></td>
</tr>
<tr>
<td class="persondata-label" style="color:#aaa;">Date of birth</td>
<td>1921-02-24</td>
</tr>
<tr>
<td class="persondata-label" style="color:#aaa;">Place of birth</td>
<td><a href="/wiki/New_York_City,_New_York" title="New York City, New York" class="mw-redirect">New York City, New York</a>, <a href="/wiki/United_States" title="United States">United States</a></td>
</tr>
<tr>
<td class="persondata-label" style="color:#aaa;">Date of death</td>
<td></td>
</tr>
<tr>
<td class="persondata-label" style="color:#aaa;">Place of death</td>
<td></td>
</tr>
</table>
*/