PHP:xpath替换内容标记

我想更改该内容：

Cambio turno (FL) HMLN 16:00-20:00 del 08/09/2018 con (FL) HMLN 15:00-19:00 del 05/09/2018

进入：

---

我不知道为什么必须选择与Accept按钮相关的有问题的节点，但您可以使用这样一个XPath查询来完成

//*[td/table/tbody/tr/td/label[contains(.,"Accetta")]]/td[5]

然后像这样替换内部文本：

$dom = new DOMDocument();
$dom->loadHTML($str);
$xpath = new DOMXPath($dom);
$operazione_select = $xpath->query('//*[td/table/tbody/tr/td/label[contains(.,"Accetta")]]/td[5]');
foreach ($operazione_select as $node) {
    //create link
    $newlink = $dom->createElement('a', $node->nodeValue);
    $newlink->setAttribute('href', 'http://prova.it');
    $node->removeChild($node->childNodes->item(0));
    $node->appendChild($newlink);    
}

 $xpR=new DOMXPath( $dom_richieste_r );
  $operazione_select= $xpR->query( '//label[contains(.,"Accetta")]' );
  if( !empty( $operazione_select )){
    foreach( $operazione_select as $node2 ){
       //$node2->parentNode->parentNode->parentNode->parentNode->parentNode->firstChild->nextSibling->nextSibling->nextSibling->nextSibling->C14N(); // get Cambio turno (FL) HMLN 16:00-20:00 del 08/09/2018 con (FL) HMLN 15:00-19:00 del 05/09/2018 

       $newelement = $dom_richieste_r->createElement('a', 'prova'); 
       $newelement->setAttribute("href", "http://prova.it");
       $link_1=$node2->parentNode->parentNode->parentNode->parentNode->parentNode->firstChild->nextSibling->nextSibling->nextSibling->nextSibling;

      $link_1->replaceChild($newelement, $link_1);

    }
   } 

//*[td/table/tbody/tr/td/label[contains(.,"Accetta")]]/td[5]

$dom = new DOMDocument();
$dom->loadHTML($str);
$xpath = new DOMXPath($dom);
$operazione_select = $xpath->query('//*[td/table/tbody/tr/td/label[contains(.,"Accetta")]]/td[5]');
foreach ($operazione_select as $node) {
    //create link
    $newlink = $dom->createElement('a', $node->nodeValue);
    $newlink->setAttribute('href', 'http://prova.it');
    $node->removeChild($node->childNodes->item(0));
    $node->appendChild($newlink);    
}