Avoid side menu to close on tap

Hy, I am building a Ionic App that uses side menù.
Is there a way to programmatically avoid the menu closes after user press on it?
I need this because i want one of the menù item to be a toggle to show 2 more hidden menu item.
In other words one of the menu item of my menù represent a category and i want that when the user press it, it show the items of the category.
Right now i can’t stop the side menù to close when i press on it. Is there a way to do what i want?
Thank you for your time