<!-- Menu Left -->
$(function() {  
$("#accordion").tabs("#accordion div.pane, #accordion div.pane2, #accordion div.pane3, #accordion div.pane4, #accordion div.pane5, #accordion div.pane6", {tabs: 'h2', effect: 'slide', initialIndex: null});
});
<!-- Menu Geurenlijst -->
$(function() {  
$("#accordionGeurL").tabs("#accordionGeurL div.geurTab1", {tabs: 'h2', effect: 'slide', initialIndex: null});
});