How can I display link category

Try the “wp_list_categories” tag.

<?php wp_list_categories('orderby=name'); ?>

Here’s more in the WordPress Codex on its usage.

If you want to list only certain categories, you can use the include/exclude arguments.

Hope that helps!
Derek M.

hmm,

I have

my links:
[category]
https://www.aaaa.com

[categoty2]
https://www.bbbb.com
https://www.cccc.com

[category3]
https://www.ddd.com
https://www.eee.com

wp_list_categories I think I can use when I want to display category of post not links

I think you are looking for

wp_list_bookmarks() and will want to use the category name parameter.

https://codex.www.ads-software.com/Template_Tags/wp_list_bookmarks