Convert parent/child php array to html table

I have the following PHP array.

Array
(
 [168] => Array
    (
        [link] => asdfasdf
        [children] => Array
            (
                [239] => Array
                    (
                        [link] => tascatestlalal
                        [children] => Array
                            (
                            )
                    )
                [240] => Array
                    (
                        [link] => otrotestttt
                        [children] => Array
                            (
                            )
                    )
            )
    )
[229] => Array
    (
        [link] => Sub-task ex
        [children] => Array
            (
            )
    )

[230] => Array
    (
        [link] => Sub-task test
        [children] => Array
            (
                [231] => Array
                    (
                        [link] => tasktest1
                        [children] => Array
                            (
                            )
                    )
                [232] => Array
                    (
                        [link] => tasktest 2
                        [children] => Array
                            (
                                [233] => Array
                                    (
                                        [link] => tasktest 5
                                        [children] => Array
                                            (
                                                [235] => Array
                                                    (
                                                        [link] => tasca235
                                                        [children] => Array
                                                            (
                                                            )
                                                    )
                                            )
                                    )
                            )
                    )
                [234] => Array
                    (
                        [link] => tasca234
                        [children] => Array
                            (
                            )
                    )
            )
    )
 )  

and I need to convert it into this

<table>
 <tr>
 <td>
 Sub-task
 </td>
 </tr>
 <tr>
 <td>
 --Tasktest1
  </td>
  </tr>
  <tr>
  <td>
  --tasktest 2
  </td>
  </tr>
  <tr>
  <td>
  ---tasktest 5
  </td>
  </tr>
  <tr>
  <td>
  ----tasca235
  </td>
  </tr>
  <tr>
  <td>
  --tasca234
  </td>
  </tr>
 </table>

this I already know how to do it with a list with this function, but cant seen to modify this function to transform it into the table example above :( . some help will be greatly appreciated

function ArrayToHTMLList($arr) {
$str = "<ul class='tasklist'>";
foreach($arr as $key => $value) {

        if((!empty($value))){

          $str .="<li>";

            if(is_array($value))
                  $str .= ArrayToHTMLList($value);
            else                  
                $str .= $value;

          $str .= "</li>";         
        }

}

$str .= "</ul>";
return $str;
}