Thanks to tim_phillips in the same post he offered an .deb package that will install the DKMS modules:
The vendor drivers for the RealTek 8188cus chip, in the Edimax
EW-7811Un for example, do not compile on ubuntu 13.04, kernels 3.8 or
3.9.
There are errors with implicit declarations of functions (daemonize),
and unknown symbols in modules.
RTL8188CUS
the deb contains patched versions of the driver source code from
RTL8192xC_USB_linux_v3.4.4_4749.20121105.zip available at
Realtek site which on its own doesn't compile on ubuntu
13.04 kernel 3.8 or 3.9
this deb package will compile, install the 8192cu.ko driver, and
insert a DKMS module so that it is done on each kernel upgrade.
don't forget to blacklist the native drivers: put a file in to
/etc/modprobe.d/ with this in it
# Blacklist native RealTek 8188CUs drivers
blacklist rtl8192cu
blacklist rtl8192c_common
blacklist rtlwifi
(source)
You can download the package here and install it:
wget "https://code.google.com/p/realtek-8188cus-wireless-drivers-3444749-ubuntu-1304/downloads/detail?name=rtl8192cu-tjp-dkms_1.6_all.deb&can=2&q="
sudo dpkg -i rtl8192cu-tjp-dkms_1.6_all.deb