Download archive from here.
unzip amd-catalyst-13.11-beta-v9.4-linux-x86.x86_64.run.zip
sudo sh 'amd-catalyst-13.11-beta V9.4-linux-x86.x86_64.run' --buildpkg Ubuntu/saucy
sudo dpkg -i fglrx_13.250-0ubuntu1_amd64.deb fglrx-dev_13.250-0ubuntu1_amd64.deb fglrx-amdcccle_13.250-0ubuntu1_amd64.deb
sudo aticonfig --initial
Done.