https://forums.ddo.com/index.php?threads/finding-special-feats-in-dungeons-and-dragons-online.15255/#post-188139

You can sort by Category or by Alhabetically. Category is the default.

You can also collapse the categories. This may make it easier to find the special reaper feats, lightning trail feat etc that do not fall into a category. Expand all is the default. You can click on the +/- symbol next to the category to expand or collapse just that one category.