Please try this PHP snippet but please note that it can require further customization and testing because categories are used as distinct criteria, many features rely on this (e.g. category-specific attributes and search filters).
thank you for your reply
i tried it but it doen’t work
Categories remain as a drop down list and not as a multi select list
How do other users override this ?
Regards,
Please make sure that you added this snippet correctly (e.g. via the Code Snippets plugin), the Category field will be displayed as a drop-down, but if you select any option it will allow to select more, selected options will be added to the field area.