{Location}

>> protected/config/main.php

>> components

>> urlManager

{Basic Struction}

'urlManager'=>array(
'urlFormat'=>'path',
'rules'=>array(
//some rules here.
),

{Rule No. One}

>Rule
'posts'=>'post/list',

>Action
echo $this->createAbsoluteUrl('post/list');

>Display
http://yiilib.com/yii_lab/index.php/posts

{Rules No. Two}

>Rule
'post/<id:\d+>'=>array('post/show','urlSuffix'=>'.html'),

>Action
echo $this->createAbsoluteUrl('post/show',array('id'=>998, 'name'=>'123'));

>Display
http://yiilib.com/yii_lab/index.php/post/998.html?name=123

{Rules No.Three}

>Rule
'post/<id:\d+>/<mid:\w+>'=>array('post/view','urlSuffix'=>'.xml'),

>Action
echo $this->createAbsoluteUrl('post/view',array('id'=>998, 'mid'=>'tody'));

>Display
http://yiilib.com/yii_lab/index.php/post/998/tody.xml

{Rules No.Four}

>Rule
'http://<user:\w+>.yiilib.com/<_c:(look|seek)>'=>array('<_c>/host','urlSuffix'=>'.mp4'),

>Action
echo $this->createAbsoluteUrl('look/host',array('user'=>'BoyLee', 'mid'=>'ny-001'));
echo $this->createAbsoluteUrl('looks/host',array('user'=>'BoyLee', 'mid'=>'ny-002'));

>Display
http://BoyLee.yiilib.com/look.mp4?mid=ny-001
http://yiilib.com/looks/host/user/BoyLee/mid/ny-002

{Hidden index.php}

1.add showScriptName=>false

'urlManager'=>array(
'urlFormat'=>'path',
'showScriptName'=>false,
2.add ......./yii_lab/.htaccess , be brother with index.php and protected, and add this code in it.

Options +FollowSymLinks
IndexIgnore */*
RewriteEngine on

RewriteBase /yii_lab

# if a directory or a file exists, use it directly
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
# otherwise forward it to index.php
RewriteRule . index.php
3.make .htaccess working ....

look at this

4.make sure your rewrite is open

look at this

anyway, good luck.^&^