Math problem - Array of decimal - create price filter

[Izi]

I have a list/array of prices. From this i need to create a filter like so:

£0-25
£26-50
£51-99

etc

say I have 1000 prices in the array, how would you go about factoring the prices in to filters?

 

[Izi]

cheers folks.

i decided in the end to let the admin enter price ranges, and only show price filters if the search results contained items which fit in the specified ranges.