Large Checkbox List - Is there a way to add grouping of related options with non checkable header?

What the Title says.
I have a large checkbox list with items that can be checked for an order.
The available items belong to certain categories. Is there a way to display the category name and below it the items that belong to this category?
Order wise, this can be already done with sql ordering, but i can't figure out how to add a title with the category name for each product group.
i.e.

Group X
☐ Item A
☐ Item B
☐ Item C
Group Y
☐ Item D
☑ Item E
Group Z
☑ Item F

thank you in advance.