Yes Walmart will usually price match their online price from Walmart.com
But then again most in store prices for the same items are cheaper than online at Walmart.com since Walmart has been raising prices online at Walmart.com to increase in store traffic and sales.
So although you can usually get Walmart to price match for their online store you'll usually find the items cheaper in store anyway.
It used to be that sometimes online products were priced cheaper on Walmart.com than in stores but Walmart is starting to charge higher prices online.