在nginx的vhost站点配置文件中加入以下内容即可
if (!-d $request_filename)
{
rewrite ^/(.+)/$ /$1 permanent;
}
if ($request_uri ~* index/?$)
{
rewrite ^/(.*)/index/?$ /$1 permanent;
}
if (!-e $request_filename)
{
rewrite ^/(.*)$ /index.php?/$1 last;
break;
}