Here is the current code that I am using, I grabbed this somewhere on this forum and made a small addition for the com_sefservicemap

// IMPROVED VERSION FOR JOOMLA 1.5, SPECIFICALLY FOR GETTING CATEGORIES
// INCLUDING BLOG OR LIST STYLE CATEGORY PAGES
///////////////////////////////////
if ($option == "com_content" && $view == "category") {
   /* category list pages (blog or list style) */
   $category_id = (int)$id;
} else if (array_key_exists("catid",$_REQUEST)) {
   /* if the category id is in the URL */
   $category_id =  (int)$_REQUEST["catid"];
} else if ($option == "com_content" && $view == "article") {
   /* if it's an article page without the catid mentioned in the url */
   $nullDate = $db->Quote($db->getNullDate());
   $my_id = $db->getEscaped((int)$id);
   $query = "SELECT  title,  id,  catid,  sectionid"
      . " FROM #__content WHERE id = '$my_id' AND state = 1"
      . " AND ( publish_up = " .  $nullDate
      . " OR publish_up <= CURRENT_TIMESTAMP )"
      . " AND ( publish_down = " . $nullDate
      . " OR publish_down >= CURRENT_TIMESTAMP  )";
   $db->setQuery( $query, 0, 1 );
   $row = $db->loadObject();
   $category_id = $row->catid;
   $section_id = $row->sectionid;
}elseif ($option == "com_sefservicemap") {
return 47;
} else {
return 47;
}


if ($category_id == 34) return 47;
if ($category_id == 36) return 90;
if ($category_id == 37) return 91;
return 47; /* default if nothing else matches */
///////////////////////////////////

Notice: Trying to get property of non-object in /home/xxxxxx/public_html/modules/mod_metamod/helper.php(524) : eval()'d code on line 26

Notice: Trying to get property of non-object in /home/xxxxxx/public_html/modules/mod_metamod/helper.php(524) : eval()'d code on line 27