...making an extra table in database that would look something like:
id | domainID | page content
where the page content you need would be stored and domain id would be a foreign key from the table you started with and then all you would need to show it is call this page with an appropriate id like page.php?id=1 to show content you need for a domain 1 and so on... That way you could manage the domain pages easilly...
Basically, this would allow you to have one page to show content you need for all domains...