Hello sapineni,
If you are talking about setting some property like "Visible", there is no such property. However you can programatically set the entire group to be either Disabled (this.UltraWebListbar1.Groups[0].Disabled = true;) or Expanded (this.UltraWebListbar1.Groups[0].Expanded = true;). also you can set Enabled property to false for the item you want to "hide" (this.UltraWebListbar1.Groups[0].Items[0].Enabled = false;). Unfortunatelly the ony way to remove entirely an item is to remove it from a collection.

Hope this helps.