Sorry but you can’t with theme options. The tabbed shop element uses default wordpress functions to automatically pull the products that belong to these three categories and show them in your site. To change this you will need to change the element’s code in theme core files.
This is not recommended as it will prevent you from taking future theme updates. However, if you must then we recommend to use a child theme to make such major changes to theme.
Please keep in mind that personal customizations are not covered from this support.
