<!DOCTYPE html>
<html>
  <head>
    <title>Licznik</title>
  </head>
  <body>
   <ul id="tree1"
      role="tree" 
      tabindex="0" 
      aria-labelledby="label_1">
  <li role="treeitem" tabindex="-1" aria-expanded="true">Owoce</li>
  <li role="group">
    <ul>
      <li role="treeitem" tabindex="-1">Pomaracze</li>
      <li role="treeitem" tabindex="-1">Ananasy</li>
      ...
    </ul>
  </li>
</ul>
</body>
</html>