There are submission that do this kind of stuff, nevertheless the "manual" implementation with text labels:
% Dummy plot
plot(1:10,1:10)
% Retrieve number of Xticks
xticks = get(gca,'Xtick');
nticks = numel(xticks)-1;
% Clear Xlabels
set(gca,'Xtickl',[])
% Text options for new Xlabels
opt = {'Units' ,'Normalized',...
'HorizontalAlignment' ,'Center',...
'Rotation' ,90};
% Create text for each Xlabel
arrayfun(@(x,xlbl) text(x,-.025,sprintf('%d',xlbl),opt{:}),0:1/nticks:1,xticks)
