Hi

I think it's possible to create those groups in you xml file, just like in this tutorial https://www.odoo.com/documentation/9.0/howtos/backend.html you can add partner catagory (in the "domain" chapter). If you make a group_by with those elements created they should be displayed.

field_name= fields.Many2one('model.name', string="Label", group_expand='_function_name')

@api.model
def _function_name(self,stages,domain,order):
    columns_ids = self.env['columns.model'].search([])
    ​return columns_ids