wokamoto

You can choose (child) categories and see the posts belong to the chosen category with AJAX.
When the category you choose from the list box has child categories, the child categories will be shown in a new list box. 
Clicking the “Search” button, the list of posts belong to the bottom category which you choose will be displayed under the “Search” button.

Simple Category Search

You can choose (child) categories and see the posts belong to the chosen category with AJAX.

FirstElement

takumin

カテゴリーの選択方法を、従来のチェックボックスからドロップダウンに変えます。 
親子関係を正確に維持しながら、簡単にカテゴリー選択を行えます！
The change to dropdown from checkbox for the category. 
Accurately while maintaining the parent-child relationship, I can do the easy category selection!
<h3>Arbitrary section</h3>
Enjoy it!

Simple Category Search vs Admin DropDown Categories