Hiya,
If by "increasing order", you mean a ladderized tree, the method would be:
1. Ladderize your tree with the ape function ape::ladderize()
plot(tr)
tr2 = ape::ladderize(phy=tr, right=TRUE)
plot(tr2)
2. Save out to a new .newick file
3. Re-run BioGeoBEARS analysis on the ladderized tree, or (if that is too slow), there is a function somewhere that can transfer results on an old tree to a reordered tree. I would have to go find it though.
(reordered tree = tree with the same clades and topology, but with some nodes rotated for visual purposes, e.g. ladderizing or some other configuration)
Cheers,
Nick