.htaccess file and url. how to make in shorter?

[eluser]linderox[/eluser]
i have a function1 in the controller1

www.mydomain.com/controller1/function1/parametr1, but I want to save such construction of the controller file, but I want to reach this url by shorter line (without function1 name)
www.mydomain.com/controller1/parametr1

here is my standart .htaccess file

Code:

addDefaultCharset utf8
DirectoryIndex index.php
RewriteEngine on
RewriteCond $1 !^(index\.php|public|images|css|js|robots\.txt|favicon\.ico)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ ./index.php/$1 [L,QSA]