manage_posts_custom_column – Hook | Developer.WordPress.org

Fires in each custom column in the Posts list table. Description This hook only fires if the current post type is non-hierarchical, such as posts. Parameters $column_namestring More Information Combined with the manage_{$post_type}_posts_columns filter, this allows you to add or remove (unset) custom columns to the list post/page/custom post type pages (which automatically appear in Screen Options