Yes, Containment Priest's ability would exile those lands when they return to the battlefield from exile. The continuous effects of Urborg and Kormus Bell apply as the lands enter, so they'd enter as 1/1 black creatures. Containment Priest sees nontoken creatures trying to enter the battlefield, says "no", and exiles them again.
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Lapsed DCI Rules Advisor - Retired from playing but still hanging around
Note that the answer given in comment 2 (assuming the lands are not tokens and weren't cast) is new with the release of Ixalan. Before that set was released, replacement effects that dealt with permanents entering the battlefield generally didn't "tak[e] into account ... continuous effects that already exist and would apply to the permanent" (such as those of Urborg and Kormus Bell here), as they now do (C.R. 614.12). See also this thread.
Containment priest, Urborg and Kormus Bell