in amplify-theme/assets/js/scripts.js [192:205]
	var reduceLevels = function( list ) {
		list = list.reduce( majik, [] );
		var i;
		for ( i = 0; i < list.length; i += 1 ) {
			if ( ! list[ i ].childrens || ! list[ i ].childrens.length ) {
				continue;
			}
			list[ i ].childrens = reduceLevels( list[ i ].childrens );
		}
		return list;
	};