Those don't match -- do you want the URL to be 'http://www.abc.com' or do you want to strip the 'www' out?
If you just want the 'http://' added,
- link_to @user.website, "http://#\{@user.website}"
should work.
And just for clarity -- "www.abc.com" is a hostname, not a URL, which requires a protocol (http, https, ftp, etc.).
You might want to (re)consider which is most appropriate to store for your app's current and future use.
FWIW,
