Source : Webster's Revised Unabridged Dictionary (1913)

Disarrange \Dis`ar*range"\, v. t. [imp. & p. p. {Disarranged};
   p. pr. & vb. n. {Disarranging}.] [Pref. dis- + arrange: cf.
   F. d['e]sarranger.]
   To unsettle or disturb the order or due arrangement of; to
   throw out of order.

Source : WordNet®

disarrange
     v 1: destroy the arrangement or order of; "My son disarranged the
          papers on my desk" [ant: {arrange}]
     2: disturb the arrangement of; "disarrange the papers"