That’s a problem that the admins created. It’s a horrible idea and it’s encouraged not to do that. You migth point the admin to It’s Time We Talked About Tags
That’s why it’s encouraged not to have lots of categories. 
Another issue is that they have contrived to have the categories page not list all of the castegories (probably because there are too many). Normally, https://community.justinguitar.com/categories would list all of the categories. So what you really want is the default list of categories. 