You cannot swap plans no. The best you can do is each individually change plans to one that is current market.

The situation is I dont need my phone anymore due to work phone but I have time left on my contract but my wife is on a plan with no commitment. I really just need to get her number to my phone. 

Unfortunately you cannot easily transfer a tab from one number to another.

The only loophole around this would be to port your number to a cheap prepaid account, then port the number back to Koodo on his line with the tab.

It would cost $10 for the prepaid sim and $15 for the cheapest plan.

Alternatively, you can choose to pay the remaining Tab and Tab Bonus balance on your line. Once that is complete, schedule a callback through Koodo Assist to see if you can get on the same plan as your wife. https://Koo.do/Chat