We would like to allow or deny changes to our website that has multiple database tables (mySQL). The developer would request the changes via his admin panel on our website.

For example:
Developer1 wants to create a new page on our website, but before showing it to our visitors, we want to take a look at the page, before showing it to the mass. After checking the content, we either allow or deny the changes.

Developer2 wants to update a page that already exists, since the content is outdated. After checking the new content, we noticed that there are some minor mistakes and want to deny it with a note stating the issue.

How does an efficient database table look like, that allows us to administer page changes, but also other actions such as sending e-mails, etc?