My reinstall a copy of osx lion doesnt work because there is no disk how can i fix this on a 2007 macbook pro

I'm not sure what you mean by "there is no disk", but you might find this helps:

Reboot your Mac and immediately press and hold Option-Command-R until a spinning globe appears, then release the keys.

Then go into Disk Utility to try and erase the internal drive; hopefully, it will see the disk allowing you to do this.

Then quit disk utility and use the option to reinstall OSX.