Thread:Extension talk:CategoryTree/Sorting articles in category - numbers

Is there any option to sort articles' names in such order as below?

I have now:

xxx 1 yy

xxx 10 yy

xxx 11 yy

xxx 2 yy

xxx 20 yy

xxx 3 yy

And I want this:

xxx 1 yy

xxx 2 yy

xxx 3 yy

xxx 10 yy

xxx 11 yy

xxx 20 yy