void      constructor HTML_Menu_SigmaTreeRenderer::HTML_Menu_SigmaTreeRenderer ( 
      object HTML_Template_Sigma &$tpl
       , string  $prefix = 'mu_'
     )
Sets the template object to use and sets prefix for template blocks and placeholders. We use prefix to avoid name collisions with existing template blocks and it is customisable to allow output of several menus into one template.
&$tpl
       template object to use for output
$prefix
       prefix for template blocks and placeholders
throws no exceptions thrown
This function can not be called statically.
