mod_rewrite
[Apache]
/hogehoge/detail.php?id=XZ666
↓
/hogehoge/st/detail/XZ666
RewriteCond %{REQUEST_URI} ^/[a-z]+/detail\.php$
RewriteCond %{QUERY_STRING} ^id=([A-Za-z0-9_\-]+)$
RewriteRule ^/([a-z]+)/detail\.php /$1/st/detail/%1? [R,L]
ex)
http://www.nanbu.com/blog/blog1/detail-201.html