Changing dendrogram x-axis

Hi.. I have generated a dendrogram plot of the hierarchical binary cluster tree. I need to change the x axis of dendrogram plot by calling it from work space (say like B, A is data). Now I see the x-axis in form of ordered numbers starting from 1. A is 64x3 and B is 64x1, B is integer representing some real sample number. So I need the plot to be in a way, I can classify my samples. Expecting your help.