help with website

my website is just up and running (first) and the home page is on myname.co.uk, but when I go into any pages of the home page, the URL says it is on my mates name who is providing the webspace. He says to change this so the URL’s stay on myname.co.uk i would have to recode or something but that sounds real complicated, and like many other It “geeks” he refuses to give a straight answer but looks smug and tells me he is going to sort it. HELP!