How hide some categories links

Hi,

I do not find some information on the forum.
I test with various key words in Search box but my english find anything
I would like to hide some links in the sidebox categories for all the visitors.
These hided links are only visible for the logged members.
What is the way?

Regards.
Olivier

Hi,

This morning, I am a little fresher…
11:37 PM, it is the hour when Cendrillon transforms herself into pumpkin :p

http://www.zen-cart.com/index.php?main_page=product_contrib_info&products_id=391

bye
Olivier

rectification,

This one is better...
http://www.zen-cart.com/index.php?main_page=product_contrib_info&products_id=574

...
I have installed the last written mod and take a look on its content lines.
I understood how it work.
I want to be sure, when I hide a categories link, the search engine can't found it.
Is this line

$title_link = false;

on includes/modules/sideboxes/mystery_box how broke the link?

The complet code

<?php

require($template->get_template_dir('tpl_mystery_box.php',DIR_WS_TEMPLATE, $current_page_base,'sideboxes'). '/tpl_mystery_box.php');

      $title =  'Mystery Box';
      $title_link = false;
      require($template->get_template_dir($column_box_default, DIR_WS_TEMPLATE, $current_page_base,'common') . '/' . $column_box_default);
    
  
?>

Regards
Olivier