Hi,
Sorry for the inconvenience, but customization is beyond our support scope - it includes fixing bugs and guidance about the available features Support Policy | HivePress
If customizations are required for your site, please try customizing it using the collection of code snippets Search · user:hivepress · GitHub and other developer resources, or consider hiring someone for custom work https://fvrr.co/32e7LvY
Also, please check this topic - Show Select Category page instead of a drop-down in Add Listing