{pboot:nav}
[nav:name]
{/pboot:nav}

{pboot:nav}

  [nav:name]

  {pboot:2nav parent=[nav:scode]}

    [2nav:name]

  {/pboot:2nav}

{/pboot:nav}

{pboot:nav}                   

  [nav:name]

  {pboot:2nav parent=[nav:scode]}

    [2nav:name]

    {pboot:3nav parent=[2nav:scode]}

      [3nav:name]

    {/pboot:3nav}

  {/pboot:2nav}

{/pboot:nav}