<?php
$doc = new DOMDocument;
$doc->loadHTMLFile('gut');
$otac = $doc->getElementById('mw-content-text');
$node = $otac->firstChild;

$domElemsToRemove = array();

foreach ($node->childNodes as $cvor)
    {
       if ($cvor->nodeName != 'h2') {
            $domElemsToRemove[] = $cvor;
              echo $cvor->nodeName . "<br>";
            } else {
            echo "Poslednji: " . $cvor->nodeName . "<br>";
                break;
            }
           }

foreach( $domElemsToRemove as $domElement ){
  $node->removeChild($domElement);
}


echo 'Wrote: ' . $doc->node->save("test") . ' bytes';

?>