using DevExpress.XtraNavBar;
// ...
for (int i = 0; i < navBarControl1.Items.Count; i++) {
   NavBarItem item = navBarControl1.Items[i];
   // perform some operations on an item here
   //...
}

Imports DevExpress.XtraNavBar
' ...
Dim I As Integer
For I = 0 To NavBarControl1.Items.Count - 1
   Dim Item As NavBarItem = NavBarControl1.Items(I)
   ' perform some operations on an item here
   '...
Next