No, it's not. We routinely have people move from one training provider to another, usually because they are switching from distance learning to full time or vice-versa but these are modular students staying in the modular system.
Although people occasionally switch from integrated to modular it is much more unusual to go the other way. If you do this you will only get limited credit for your flying hours, one of the integrated providers will tell you how much, and I would be very surprised if you get any credit at all for your ground studies.
I would strongly suggest you don't follow this plan. If you are planning to go integrated don't start on the modular route, you'll end up wasting money and effort. If you want to do something useful at this stage get hold of a second hand copy of Trevor Thom's PPL books and learn everything in them, front to back. Have you done your PPL yet?