I agree with the docs -- fiberous foods including vegetables and fruits 
will only make her feel worse and further inflame her already inflamed bowels.  
 I would think a meat/fish/foul and fat diet best - low carb would be more 
important than forcing down veggies or fruits or nuts whose fibers would 
only serve to irritate the already irritated colon. Why can't she have eggs in 
the morning and meat/fish/foul at lunch and dinner?? Soothing homemade bonte 
broths would get her additional nutrients.  Meat and fat is paleo. 
 
 Here is a chapter from Wolfgang Lutz's book (he is an Austrian 
gastroeneterologist who has used low carbohydrated diets for all manner of bowel/gut 
disorders).  Scroll down to the colitis section.  He also wrote "Life Without 
Bread" -- a general low-carb book.   _Dr. med. Wolfgang Lutz: Dismantling a 
Myth: Chapter VII_ (http://www.scdiet.org/7archives/lutz/lutz7.html)   Life 
Without Bread is available in the US.  He's in his 90s now.
 
I think that in your family member's case -- maintaing a low carb (low 
fiber, no grain (especially no wheat) or legumes ) diet would provide relief.    
Lutz low carb diet is not paleo in the sense he allows dairy but it's the 
vegetation and fruit fibers that make colitis flairs worse.  My brother had 
it and ended up having surgery because he wouldn't change his truly 
horrendous junk food diet.  An old boyfriend of mine  had a more severe form of 
ulcerative colitis than my brother and he became nearly skeletal because 
virtually everything he ate other than protein and fat gave him the bloody diarrhea 
and pain etc.  Seriously -- he was running to the bathroom several times an 
hour.   If your family friend's case is severe, she will need supplements to 
gain the nutrients she's missing while her colitis is flairing.  Try to 
find a nutritionally oriented physician with experience in this area  to help 
guide her.