When creating a category of fixed page.

Hello hanakousuke,

Unfortunately, I do not exactly understand what you want to achieve. You should provide your website URL so I can inspect it closer and also, so I will be able to provide a more accurate code. Also, if you want to hide something else on your website, you should use a bit of CSS code to do it. For more information about how you should create your custom CSS code, please consult here -> https://forum.tagdiv.com/create-custom-code-using-the-browsers-inspector/

Thanks for your understanding!

Hello hanakousuke,

I have inspected your website and I saw that you are using the Widget -> Custom Menu, right -> https://www.screencast.com/t/D4KcrocjtU? Notice that widget has own functionality to display all categories and subcategories, being a WordPress widget and the theme does not have any such an option that allows you hide the subcategories for the page, sorry! A quick solution in this regard would be to use a bit of CSS code to hide them. Try the code below and place it in Theme panel->Custom CSS area.

The code is ->

.widget_nav_menu .sub-menu {
display:none;
}

Hope this helps!

Thanks for the message!