This appears to be nonsense. If you want to get married in some cheaphell (or wherever it is where the Catholics get married) then probably, yes, one of the couple should preferably be Catholic, duh!
But there is no requirement for the other person to convert, or that the children should be brought up as Catholic, for that matter.
It's always been my understanding that the Catholic church allows a Catholic to marry a non-Catholic under the condition that the children are brought up Catholic. The non-Catholic parent is not forced to convert, though.
fair enough. point taken.