this is server sided and the reason why people are more active here than client is because there aren't many people who are good client sided. but yeah. go to client.java or player.java and search for
Code:
public void sidebarSettings() {
then
Code:
this.setSidebarInterface(1, 3917);
this.setSidebarInterface(2, 638);
this.setSidebarInterface(3, 3213);
this.setSidebarInterface(4, 1644);
Code:
this.setSidebarInterface(4, 1644);
4 = which tab
1644 = interface
you might be missing some tabs, should have like up to 15 or 16 for 562