<IfModule mod_rewrite.c>
  RewriteEngine on
  #301
  rewritecond %{http_host} ^timmy.min-min.com [nc]
  rewriterule ^(.*)$ http://imtimmy.com/$1 [r=301,nc]
 
  # m/wap.heqee.com 二级目录
  RewriteCond %{REQUEST_URI} !^/wap/.*
  RewriteCond %{HTTP_HOST} ^wap.imtimmy.com$ [OR]
  RewriteCond %{HTTP_HOST} ^m.imtimmy.com$
  RewriteRule ^(.*) /wap/$1 [L]
 
  # aaa.com 域名aaa.com
  RewriteCond %{REQUEST_URI} !^/aaa/.*
  RewriteCond %{HTTP_HOST} ^aaa.com$ [OR]
  RewriteCond %{HTTP_HOST} ^www.aaa.com$
  RewriteRule ^(.*) /aaa/$1 [L]
 
  # bbb.com 域名bbb.com
  RewriteCond %{REQUEST_URI} !^/bbb/.*
  RewriteCond %{HTTP_HOST} ^bbb.com$ [OR]
  RewriteCond %{HTTP_HOST} ^www.bbb.com$
  RewriteRule ^(.*) /bbb/$1 [L]
</IfModule>

 转载自Timmy's Blog