How to remove folder from url path?

Question

1C-Bitrix

Hello everybody!
Here is a question. There is a folder on the site:
site.com/folder
and it has many subfolders:
site.com/folder/folder1
site.com/folder/folder2 etc.
what to write in .htaccess to make links like:
site.com/folder1
site.com/folder2
i.e. remove folder from path.
added to .htaccess:
RewriteRule ^folder/(.+)$ site.com/$1 [R=301,L]
did not help.

Answer 1

Need to open documentation