[ОлегА]

$(function(){
$('.all_time1').click(function(){

if($(this).is(':checked')){
      var $time = '12:30'
      $('#timetable_city input[type=checkbox]:checked').each(function(){
            index = $(this).attr('data-rel')

  $('#timetable_city input[type=text][data-rel='+index+']').val($time)
      })
} else {
  $('#timetable_city input[type=text]').val('')
}

})
})