How to display elements in a column correctly?

Question

PHP

The site has a list of categories. Categories are arranged alphabetically horizontally.
The scheme is
a a a a b b b c c y y
d d e f f g z z z It is

necessary to display these categories in alphabetical order vertically. The scheme is such
a av dzag zade
zade
i
b d ji and
How do you implement such a conclusion. Is it possible to use flexbox for such sorting, or do I need to sort on the server side and display an already prepared array of categories?

Answer 1

Made with CSS

display: flex;
    flex-flow: column wrap;

Answer 2

use column css