Multiple Framworks within a separate domain in folders

I have a framework, where I want to split it into several frameworks (MVC) per folder at the root of the domain. In the domain root I do not have any files, there are folders where I have a file in the root of each folder a .htaccess like this:

RewriteEngine on
RewriteCond %{SCRIPT_FILENAME} !-f
RewriteCond %{SCRIPT_FILENAME} !-d
RewriteRule ^(.*)$ index.php?url=$1

I would like that in my www.mydomain.com you have several folders, for example:

  

www.meudominio.com.br/pasta1
  www.mydominio.com.br/pasta2
  www.myspace.com/pasta3

And, in each folder (eg folder1, folder2, folder3) has a .htaccess file to load a framework separately with another file structure with the index.php initialization file set and other folder structure ( framework)

  

• app
    - controllers
    - models
    - views
  
• system
    - helpers
  
• web
  

.htaccess
  index.php