I come up to the idea of remodifying the file structure of the Yii.

Default Structure of the Yii Framework:

~~~
 
assets/ css/ framework/ images/ protected/ themes/ index.php
 
- a~~~
 
 
All we need is to transfer the outer folder of the default file structure of Yii Framework.
 
In our index.php code, we do have.:  
```php 
<?php
 
// change the following paths if necessary
 
$yii=dirname(__FILE__).'/framework/yii.php';
 
$config=dirname(__FILE__).'/protected/config/main.php';
 

 
// remove the following lines when in production mode
 
defined('YII_DEBUG') or define('YII_DEBUG',true);
 
// specify how many levels of call stack should be shown in each log message
 
defined('YII_TRACE_LEVEL') or define('YII_TRACE_LEVEL',3);
 
 
require_once($yii);
 
Yii::createWebApplication($config)->run();  
```
We can actually remodify to it like this.: ~~~
 
assets/ css/ yii/ 1.1.8/ images/
 
webapp/ 1.0/ themes/ index.php  
~~~
In our code for the index.php with the implementation of the modification of thed file structure:  
```php 
<?php
 
// change the following paths if necessary
 
$yii=dirname(__FILE__).'/yii/1.1.8/yii.php';
 
$config=dirname(__FILE__).'/webapp/1.0/config/main.php';
 
 
// remove the following lines when in production mode
 
defined('YII_DEBUG') or define('YII_DEBUG',true);
 
// specify how many levels of call stack should be shown in each log message
 
defined('YII_TRACE_LEVEL') or define('YII_TRACE_LEVEL',3);
 
 
require_once($yii);
 
Yii::createWebApplication($config)->run();
 
```
 
 
*Explanation:*
 
In thise directory: ~~~
 
yii/ 1.1.8/  
~~~
we move the core in the folder 1.1.8 (based on the version of the Framework), so in this way, we can upgrade the Yii Framework without hurting the operation. In our WebApp folder: ~~~
 
webapp/ 1.0/
 
- so in t~~~
 
 
This way, we are working based on the version of the WebApp, we now rename the folder 'protected' to 'webapp', and then create a folder based on the version of the webapp, in the example is '1.0' ( in this folder, we put all the subfolders we have 'models, controllers etc..').