Help needed creating virtual folders and subfolders

[insecten]

Hi everyone! :D:thumbsup: I am new to htaccess :confused: and need help to create something like this:

if i go to mydomain.com/category1 i must get opened mydomain.com/categories.php?cat=category1

if i go to mydomain.com/category1/02 i must get opened mydomain.com/categories.php?cat=category1?page=result2
:eek:

Can you help me please? :)

Thanks ;)