Hey there,
Now that I have a better idea what your diet and training consist of, I would make the following recommendations:
Training:
your split looks good, along w/ the rep ranges. you don't need to change anything here just make sure you increase your weights and focus on compound movements (exercises that require a lot of muscle)such as squats, chin-ups, bench press, etc)
Cardio:
I was a little confused

you do 6 days and 30 minutes now? If that is the case, clean up your diet and see what happens before increasing the duration. I have a feeling that is what is holding you back right now.
Diet:
Again, I might be wrong but the way you wrote it, it looks like you only eat 3-4 meals a day. This should be 6 meals/ day. Eat a meal every 3 hours or so. Each meal should be comprised of a protein (very important) and a carb or a protein and a fat (good fat such as natural Peanutbutter, flax oil, safflower oil, almonds). Veggies should be your best friend

they really fill you up - stick to salad stuff, also broccoli and peppers are good.
You can cut carbs out of your last meal and just have your protein shake then. I usually have a protein shake before bed with PB. Do you know approximately how many calories per day you are taking in now? Let me know..I will try to help come up w/something 4 u.