My website has a catalog with over 200 items. To make it easier for users to find them, I'd like to divide this catalog into three sections, one for each product category.
From what I understand, I need to create three different catalogs and group them into a submenu. Could someone clarify the following points for me?
1) Is this the best method, or is it possible to group items within the existing catalog?
2) Is it possible to allow users to view all subcatalogs simply by clicking on the submenu? (In the example, the submenu is TRUCK 
while the Catalogs are FRONT LIGHTS, TAIL LIGHTS, and MARKER LIGHTS.)
3) Is there a way to move items between catalogs without duplicating the item and deleting the original (which also causes the loss of references to related items).
4) Creating different catalogs will change the URL of the items compared to the current one, which will cause the loss of links to items already tracked online (error 404). Is there a way to fix this problem?