Remove the "All" submenu from Mega Menu

Hi, I want to remove the “All” submenu from Mega Menu:

Is there any CCS custom code for this?
Thanks!

Hi

Try this css in theme panel > custom code > custom css: http://screencast.com/t/ypdIUbipYe

.block-mega-child-cats a:first-child {
display: none;
}

Thanks!

When does “All” appear? Is it only when the Main Menu Item (e.g. “Places” in http://screencast.com/t/ypdIUbipYe) is a parent Category to the Child Menu Items (“Countryside”, “Desert”, etc)?

My categories don’t have a parent category.
In the menu, I created a Custom Link and added the categories underneath it.
As a result, when I hover the menu item (“More” in my screenshot), all the categories appear under the image thumbs, not on the left like in the ArgBursatil’s screenshot.

My menu: https://www.dropbox.com/s/ffb0nsm9yvcl68g/menu.jpg?dl=0

When would they appear on the left?

Thank you,
Natalie