Allow me to preface this by stating that I am a newbie at building sites. Having said that, let's move right along...

My friend has a website which is comprised of standard PHP, CSS, and HTML.

He has asked me to help him turn it into a responsive site so that it displays nicely on mobile devices. Can anyone suggest a tutorial or way of doing this without rebuilding the entire site, if such a method even exists?

Here is a link to the website:


thanks in advance.