1. Apache模块 开启rewrite

2..htaccess文件中

<IfModule mod_rewrite.c>

  Options +FollowSymlinks

  RewriteEngine On

  RewriteCond %{HTTP_HOST}   ^XXXkuan.cn$ [OR]

  RewriteCond %{HTTP_HOST}   ^XXXwang.com$ [OR]

  RewriteCond %{HTTP_HOST}   ^www.xxxkuan.cn$ [NC]

  RewriteRule ^(.*)$ http://www.xxxwang.com/$1 [R=301,L]

  RewriteCond %{REQUEST_FILENAME} !-d

  RewriteCond %{REQUEST_FILENAME} !-f

  RewriteRule ^(.*)$ index.php?/$1 [QSA,PT,L]

</IfModule>