Userdisp aspx not updating
They aren’t standards compliant, of course, but by adding your own attributes you can store any values you might need.Using this simple bit of script fills in the values for the Project Manager by getting the right items and plugging the values into the DOM, like so.
I did find one trick to at least allow the items to be displayed, even though the multi-select column values will not be displayed. We can use script and my SPServices j Query library to “fill in” the values after the page loads.
Now go back into the list settings and change the Project Manager column settings so that it allows multiple values.