show text in select box in jquery -

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i have select box , according selected value want show value in next selected box. code like:

$('#category').change(function(){         var cat_val = $('#category option:selected').text();         if(cat_val == 'online'){             $('#workshop-row').hide();             $('#bu_id').val(22);         }else{             $('#workshop-row').show();         }     });

by doing $('#bu_id').val(22); can value. need set text not val() 

$('#bu_id option:selected').text("online");

that means if select online first select box in 2nd select box, value text online selected.

please guide me. in advance.

this select option has text value cat_val 

   $("#bu_id option:contains(" + cat_val + ")").attr('selected', 'selected');

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