PHP DOM Document将整个表复制成一个新的div

I receive HTML table from jquery summernote like this

<div class="pasted">
   <table class="table table-bordered" style="width: 100%;">
      <tbody>
         <tr>
            <td>
              item 1
            </td>
         </tr>
       </tbody>
     </table>
</div>

Now i want to convert to this using PHP

<div class="pasted">
   <div class="table-responsive">
      <table class="table table-bordered table-summernote1">
         <tbody>
            <tr>
               <td>
                 item 1
               </td>
            </tr>
         </tbody>
        </table>
   </div>
</div>

Here is my PHP Code:

<?php

$dom = new DOMDocument();
$dom->loadHTML($text, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);

$b = $dom->getElementsByTagName('table');

foreach ( $b as $t )
{
    if ( $t->hasAttributes() )
    {
        foreach ( $t->attributes as $attr )
        {
            $t->removeAttribute($attr->nodeName);
        }

        $t->removeAttribute("style");

        $t->setAttribute('class', 'table table-bordered table-summernote1');

        $responsive  = $dom->createElement('div');
        $t->insertBefore($responsive);
        $responsive->setAttribute('class', 'table-responsive');

        $frag = $t->cloneNode(true);

        $responsive->appendChild($frag);
    }
}

?>

PHP code does not work. page hangs on $responsive->appendChild($frag) and processing is never ended.

I have also tried with preg_replace but does not work

foreach ( $b as $t )
{
    if ( $t->hasAttributes() )
    {
        foreach ( $t->attributes as $attr )
        {
            $t->removeAttribute($attr->nodeName);
        }

        $t->removeAttribute("style");
    }
}

$text = $dom->saveHTML();

$text = preg_replace('/<table>(.*)<\/table>/isum', '<div class="table-responsive"><table class="table table-bordered table-summernote1">$1</table></div>', $text);

It will convert just first 1 or 2 tables. if there are multiple tables, one table goes into another table.

what is the better solution to solve this?

It seems to be objecting to adding the cloned node inside the node your cloning. I've changed how $responsive is added (to the parent of the table) and remove the $t node before adding the clone back in.

foreach ( $b as $t )
{
    if ( $t->hasAttributes() )
    {
        foreach ( $t->attributes as $attr )
        {
            $t->removeAttribute($attr->nodeName);
        }

        $t->removeAttribute("style");

        $t->setAttribute('class', 'table table-bordered table-summernote1');

        $responsive  = $dom->createElement('div');
        $t->parentNode->insertBefore($responsive, $t);
        $responsive->setAttribute('class', 'table-responsive');

        $frag = $t->cloneNode(true);
        $t->parentNode->removeChild($t);

        $responsive->appendChild($frag);
    }
}