To hide a menu item and views from employees who have access to the model in Odoo, you can follow these steps:

Go to the Odoo interface and open the "Settings" menu.
Under the "Users & Companies" section, select "Access Rights".
Find the model that the employees have access to and select it.
Look for the employee group that you want to restrict and click on it to open the access rights.
Under the "Other" tab, you will find a field called "Groups". Here, you can uncheck the box next to the employee group that you want to restrict.
Once you have unchecked the box, the menu item and views related to that model will no longer be visible to the employees in that group.

Please note that this method will restrict access to the entire model, so the employees in the restricted group will not be able to access any of the views or actions related to that model. If you need to restrict access to specific views or actions within the model, you may need to use more advanced access control methods such as record rules or groups.