For text based install you need to get the Alternate CD.
The text based alternate installer can be downloaded from the various download methods above. This installation CD is suited for computers unable to run the graphical desktop based installation, either because their computer does not meet the minimum requirements for the live CD or because their computer requires configuration after the installation is complete in order to use the desktop. The alternate installer also includes advanced features such as LVM support.
Desktop Alternate 32bit CD, and Desktop Alternate 64bit CD.
Thanks to soulsource, the Kubuntu website does state that "The DVD includes both the live image/desktop installer and text based alternate installer". So how to start the text based installer from the DVD? Well I had to download the DVD version of Kubuntu, and once booted from the DVD, I was presented with a menu, one of the options was to Install Kubuntu in text mode. See image below.
Note: The Kubuntu CD is 704MB, where as the DVD is 3.7GB. Make sure that you downloaded the right file. The CD version will not have the text install, for that you need to get the Alternate CD. Where as the DVD version will have the live image/desktop installer and text based alternate installer.