There may be other unforeseen breakage primarily in the handbook portion of the wiki.
The Table Of Contents section of each "PC-BSD® Users Handbook" page may be the best workaround.
Using the Text Installer/10.0
(Sorry for the inconvenience)
If you prefer to perform an installation using an ncurses menu rather than a full graphical installer, select the option "Text Install/Emergency Console" from the installer boot menu shown in Figure 3a. Once the installer finishes loading, you will see the screen shown in Figure 5.1a.
Figure 5.1a: Text Installation Menu