Can you connect cable with wifi?

Please clarify.

Do you mean use a wireless bridge to span a distance from your cable modem to some devices? If so, then yes.

Some televisions also support wifi for specific apps like Netflix, but in general if you mean to connect your cable television to your cable channels, not without some type of streaming program setup that some televisions support along with specific computer software -- like some of the newer Samsung LCDs using Allshare.