jquery - Allow user to select option only once -

i using cakephp 2.4.4 .i have multiple select boxes same option.basically dynamically generated select boxes.i want 1 option should selected once.i tried disable option once selected.but wont appropriate because if user want change selection not possible.

how can done?

edited

$('.select_user').change(function (){      $(this).find('option:selected').prop('disabled', true); }); 

here select_user class of selectboxes