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{eyou:channel type="top" row="60" id="field" currentstyle="hover"}

  {$field.typename}

  {eyou:notempty name="$field.children"}

   {eyou:channel name="$field.children" row="100" id="field2"}

    {$field2.typename}

     {eyou:notempty name="$field2.children"}

      {eyou:channel name="$field2.children" row="100" id="field3"}

      {$field3.typename}

      {/eyou:channel}

    {/eyou:notempty}

  {/eyou:channel}

 {/eyou:notempty}

{/eyou:channel}