If you want Zen Cart to *never* include your categories in *any* of its generated metatags on *any* page in Zen Cart, comment out the following code in /includes/modules/your_template/meta_tags.php:
Code:
// Get all top category names for use with web site keywords
$sql = "select cd.categories_name from " . TABLE_CATEGORIES . " c, " . TABLE_CATEGORIES_DESCRIPTION . " cd where c.parent_id = 0 and c.categories_id = cd.categories_id and cd.language_id='" . (int)$_SESSION['languages_id'] . "' and c.categories_status=1";
$keywords_metatags = $db->Execute($sql);
while (!$keywords_metatags->EOF) {
$keywords_string_metatags .= zen_clean_html($keywords_metatags->fields['categories_name']) . METATAGS_DIVIDER;
$keywords_metatags->MoveNext();
}