Help hiding a sidebox from certain pages

[ray-the-otter]

I also use this (another of Ajeh's posts)

 if (!isset($ezpage_id) || !in_array($ezpage_id,explode(",",'1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35'))) {
    require($template->get_template_dir('tpl_categories.php',DIR_WS_TEMPLATE, $current_page_base,'sideboxes'). '/tpl_categories.php');

    $title = BOX_HEADING_CATEGORIES;
    $title_link = false;

    require($template->get_template_dir($column_box_default, DIR_WS_TEMPLATE, $current_page_base,'common') . '/' . $column_box_default); 

But swapping $ezpage_id for $manufacturers_id does not work either??

(I must point out that I really don't know what I am doing)