dataobject model class

Good morning, I'm working with a tool who manage several web site. Every site has a directory corresponding to his database. But several web-sites have the same features (like a file manager for exemple) . When I do an update on a data-object classe, I must copy the same file on every directory. site1 : file.php filecategory.php category.php... site2 : file.php filecategory.php category.php... .... Does exist a solution for doing update a time ?? but I wouldn't use a extending classe. Thank you for advance !