Now, when submitting the same information through the iRail website, the same link was added to the results. Yet, these links were broken/unavailable, because the session with the NMBS/SNCB site was no longer valid.
I have now replaced these links with Google Maps links. They are not only displaying the station’s location, but also the directions (by car, that is. I guess Google won’t be adding “train directions” anywhere soon) to eachother.
This will open the native Maps app on the iPhone.
Special thanks to alastair for helping out on this one.