JSFiddle - React, Tailwind, and code Playground

HTML

<table>
<tbody>

  <tr class="">
    <td class="rozwin">
      <div class="collapse" id="collapseExample-2"> // original setting div
      </div>
    </td>
    <td class="mrkPoradaLp">2</td>
  </tr>

  <tr class="">
    <td class="rozwin">
      <div class="collapse" id="collapseExample-1">  // original setting div
      </div>
    </td>
    <td class="mrkPoradaLp">3</td>
  </tr>

</tbody>
</table>

JavaScript

$('.collapse').each(function(index){
    //$(this).insertAfter($(this).parents('tr'));
    
    $('<tr><td id="collapse_' + index + '" colspan="2">').insertAfter($(this).parents('tr'));
    $(this).appendTo('#collapse_' + index);
});