Group only references

Hello! I want to get the list in "grouped" mode of the references, but I can't do it because of how your html is.

23ac0d29-412d-40ae-8024-266b34a3981d

2222222222222

I only get to group the name, but I only want the reference.
The only thing I get is that it is displayed like this:

Can be done? or is it not possible?

URL:https://www.recambios-motos.com/yamaha/dt125r/2005/cilindro-3.html

Thanks!!!