CWM Recovery, short for clockwork mod recovery, has been released for the Samsung Galaxy Tab 3 8.0 tablet. This has been tested to work with only T311 and T310 model of Tab 8.0, so do not try to install it on T315 as its developer has not tested it on those models.
So, here are the instructions. Download it from here and extract it on your computer. Then, using ODIN, flash the recovery.tar.md5 file.
By installing CWM, you will be able to flash custom ROM and custom kernels on your Galaxy Tab 8.0 mini tablet.