Working out, Intertwined with some cardio?(Vegetarian Lifestyle) Help!

[RedJune]

Alright here's my issue.. I workout mon-sun No rest days,

Monday chest
Tuesday Legs
Wednesday bi tri
Thursday Shoulders
Friday Back\Forearm
Saturday Full body
Sunday Push workouts

I Also do 15 mins of cardio after every workout at the end, but it's high intensity on the treadmill Sprint 30 sec on 100 speed, jog 30 sec on 50 speed, It's Just enough to burn close to 300 calories. Now the reason i do some cardio is, Im still in the process of loosing fat.. I went from 285 lbs down to a current 195, Iv'e been seeing HUGE gains the past 3 months lifting.. Now i hear that cardio burns muscle tissue, but in my case is it necessary or should i strictly stick to lifting... NOTE: My Nutrition is clean and strict. I am a vegetarian so i eat alot of veggies\beans\ NO starches what so ever Except my daily oatmeal!.. Thoughts? Feedback?

Thanks
Ivan