Replace node add/edit form with a custom form I have this custom form I made in my module which is responsible for adding/editing a specific node type. I was not able to alter the built-in add/edit form to meet my requirements so I decided to make my own forms using the form API.

The forms are doing good but I need drupal to use my custom forms whenever a user tries to add/edit a node from that specific node type instead of the original drupal's standard forms. 

It should be a matter of routing/path. I already tried menu hook but it did not work. So how can I make drupal to replace the content add/edit form for that specific node type with the one I want?
Try the pathauto module. You can use the Url Aliases page to add an alias for all of your custom node edit links.