需要htaccess用于CodeIgniter多应用程序布局

Question

这一定是个老问题。但是一直尝试通过堆栈溢出和CI论坛。 无法找到解决方案。

我的CI布局是这样的。（在localhost中）

  

-www

 - folder1
      - folder2
           - system (folder)
           - frontend (has all the contents of application folder)
                - controllers
                     - users (folder)
                         - account.php
                - models
                - views
                    - users (folder)
                         - accountdata.php
                - ...
                - ...
                - ...
           - backend (has all the contents of application folder)
                - controllers
                     - users (folder)
                         - account.php
                - models
                - views
                    - users (folder)
                         - allusersdata.php
                - ...
                - ...
                - ...
           - frontend.php (same as index.php but changed $application_folder = 'frontend';)
           - backend.php (same as index.php but changed $application_folder = 'backend';)
           - .htaccess
           - (index.php file removed)

目的

I Can easily access the site : 
http://localhost/folder1/folder2/frontend.php/users/account
And access the admin panel like : 
http://localhost/folder1/folder2/backend.php/users/account

I just want to access the site like : 
http://localhost/folder1/folder2/users/account
And access the admin panel like : 
http://localhost/folder1/folder2/manage/users/account

所以问题是我的.htacces文件的内容是什么？

我试过这个（以及更多的东西），但通过这种方式前端工作但后端方式不起作用：

<IfModule mod_rewrite.c> 
    RewriteEngine On
    RewriteBase /

    # Backend
    RewriteRule ^manage$ backend.php [L]
    RewriteRule ^manage/(.*)$ /folder1/folder2/backend.php/$1 [L]

    # Not a valid filename? Frontend
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteRule ^(.*)$ /folder1/folder2/frontend.php/$1 [L]
</IfModule>