index.html

<form class="form-horizontal">
  <div class="control-group">
    <label class="control-label">Multiple Select</label>
    <div class="controls">
      <select data-select="multiple" multiple="multiple">
        <option>blah</option>
        <option>poop</option>
        <option>blah</option>
        <option>poop</option>
        <option>blah</option>
        <option>poop</option>
      </select>
    </div>
  </div>
</form>


  									

script.js

$('[data-select="multiple"]').each(function () {
  var $select = $(this)
      $mselect = $('<div class="mselect"></div>');
  
  $select.hide();
  
  var $opts = $select.find('option');
  
  
 $select.after($mselect);
  $opts.each(function (i, opt) {
    $mselect.append('<a href="#" class="mselect-opt" data-idx="' + i + '"><i class="icon-ok  icon-white pull-right"></i>' + $(opt).text() + '</a>');
  });
  
  
});

$(document).on('click', '.mselect-opt', function (event) {
  event.preventDefault();
  var $parent = $(this).parents('.mselect'),
      $opts = $parent.find('.mselect-opt'),
      $ogselect = $parent.prev('select'),
      idx = $(this).data('idx'),
      $ogopt = $ogselect.find('option').eq(idx);
  
  $(this).toggleClass('selected');
  var val = !$ogopt.is(':selected') ? 'selected' : '';

  $ogopt.prop('selected', val);
});

style.css

body {
  padding:1em;
}

.mselect {
  display: inline-block;
  padding: 4px 0;
  margin-bottom: 9px;
  font-size: 14px;
  line-height: 20px;
  color: #555;
  -webkit-border-radius: 3px;
  -moz-border-radius: 3px;
  border-radius: 3px;
  height: auto;
  width: 220px;
  background-color: white;
  border: 1px solid #BBB;
  max-height:80px;
  overflow-y:scroll;
}

.mselect-opt {
  display:block;
  cursor:pointer;
  padding:0 6px;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.mselect-opt.selected {
  color:white;
  background:dodgerblue;
}

.mselect-opt i {
  display:none;
  margin-top:2px;
}

.mselect-opt.selected i {
  display:block;
}