I hate to say this and dash peoples' hopes, but I think Instant Classic was making the whole thing up.
One, as already pointed out, CW isn't cable, and it's not coming to cable.
Two, Kids' WB is quite dead; if it were still doing well enough to go to cable, it wouldn't have gotten canceled in the first place.
Three, notice the date he said that this is supposedly going to happen: Feb. 17, 2009. It's the same date as the digital upgrade that US television is going to undergo. Apparently some people are under the mistaken belief that this digital upgrade means that everyone in the US will be getting cable. That's not what it means at all.
Four, news like this would be all over the internet if true. I also haven't heard any cable subscribers saying anything about this.
Five, Kids' WB doesn't have nearly enough shows to become its' own channel, and that's counting reruns.
Conclusion: Fake.