root node category 1
______node category 1.1
______node category 1.2
Then I set "node 1" as a new tab using "display as tab" addon.
Here is the problem. I want node category 1.1 and it children to be displayed all at the same time. Unfortunately its children are automatically hidden by default. So users can only see node category 1.1, node category 1.2. They would have to click to open any of them to see their children nodes.
My question is how could I let the children nodes, e.g., node 1.1.1 and 1.1.2 etc, to be displayed by default?