These are far from cheap but it does exactly what your asking for.
NMEA 2000 networking to wifi. You'll get all your navigation data or anything connected to NMEA 2000 sent out to wifi to your smart phone, iPad or laptop.
Digital Yacht - NAVLINK WIRELESS NMEA2000 SERVER
I know there is another ones that does the same thing but much cheaper.
Here are some more to check out:
I believe the Lowrance on first page only mirrors the screen your on but not sure, you should clarify that first. If it does more than that like the ones I listed, it's a great price.
The ones above is straight data sent out & received via wi-fi to the app your using.