postname subdomain?

hello,
i wanna postname.website.com
sample : http://www.website.com/i-love-you.html
i wanna : i-love-you.website.com
i how to ? please help me 🙁

[ Duplicate http://ww.wp.xz.cn/support/topic/plugin-subdomains-help-me?replies=1 closing. Please do not open up new topics on the same subject, stick with the original one. ]