filomena_DAmo answered on September 19th 19 at 00:08
If you do not remove items or reduce them, then do in two/three rows. How do You like the idea? CSS is simple, if you can not, contact the specialists if you don't want to spend money, take your time and find the plugin =)
Bettie answered on September 19th 19 at 00:10
Search by key phrase WordPress Mega Menu. There are free and paid solutions. Menu can be arranged in several columns.
Christa.Kiehn answered on September 19th 19 at 00:12
And how do you want it to change if it is impossible to remove items and you can not change the appearance?
Stick the items in the subparagraphs allow standard tools of WP, but if you need something else, then you first need to figure out what you want.