jQuery Custom Select Box

jQuery 

// Iterate over each select element
$('select').each(function() {

    // Cache the number of options
    var $this = $(this),
        numberOfOptions = $(this).children('option').length;

    // Hides the select element
    $this.addClass('s-hidden');

    // Wrap the select element in a div
    $this.wrap('<div class="select"></div>');

    // Insert a styled div to sit over the top of the hidden select element
    $this.after('<div class="styledSelect"></div>');

    // Cache the styled div
    var $styledSelect = $this.next('div.styledSelect');

    // Show the first select option in the styled div
    $styledSelect.text($this.children('option').eq(0).text());

    // Insert an unordered list after the styled div and also cache the list
    var $list = $('<ul />', {
        'class': 'options'
    }).insertAfter($styledSelect);

    // Insert a list item into the unordered list for each select option
    for (var i = 0; i < numberOfOptions; i++) {
        $('<li />', {
            text: $this.children('option').eq(i).text(),
            rel: $this.children('option').eq(i).val()
        }).appendTo($list);
    }

    // Cache the list items
    var $listItems = $list.children('li');

    // Show the unordered list when the styled div is clicked (also hides it if the div is clicked again)
    $styledSelect.click(function(e) {
        e.stopPropagation();
        $('div.styledSelect.active').each(function() {
            $(this).removeClass('active').next('ul.options').hide();
        });
        $(this).toggleClass('active').next('ul.options').toggle();
    });

    // Hides the unordered list when a list item is clicked and updates the styled div to show the selected list item
    // Updates the select element to have the value of the equivalent option
    $listItems.click(function(e) {
        e.stopPropagation();
        $styledSelect.text($(this).text()).removeClass('active');
        $this.val($(this).attr('rel'));
        $list.hide();
        /* alert($this.val()); Uncomment this line for demonstration! */
    });

    // Hides the unordered list when clicking outside of it
    $(document).click(function() {
        $styledSelect.removeClass('active');
        $list.hide();
    });

});

CSS 

.s-hidden {
  visibility:hidden;
  padding-right:10px;
}

.select {
  cursor:pointer;
  display:inline-block;
  position:relative;
  font:normal 11px/22px Arial,Sans-Serif;
  color:black;
  border:1px solid #ccc;
}

.styledSelect {
  position:absolute;
  top:0;
  right:0;
  bottom:0;
  left:0;
  background-color:white;
  padding:0 10px;
  font-weight:bold;
}

.styledSelect:after {
  content:"";
  width:0;
  height:0;
  border:5px solid transparent;
  border-color:black transparent transparent transparent;
  position:absolute;
  top:9px;
  right:6px;
}

.styledSelect:active,
.styledSelect.active {
  background-color:#eee;
}

.options {
  display:none;
  position:absolute;
  top:100%;
  right:0;
  left:0;
  z-index:999;
  margin:0 0;
  padding:0 0;
  list-style:none;
  border:1px solid #ccc;
  background-color:white;
  -webkit-box-shadow:0 1px 2px rgba(0,0,0,0.2);
  -moz-box-shadow:0 1px 2px rgba(0,0,0,0.2);
  box-shadow:0 1px 2px rgba(0,0,0,0.2);
}

.options li {
  padding:0 6px;
  margin:0 0;
  padding:0 10px;
}

.options li:hover {
  background-color:#39f;
  color:white;
}

Lihat Demo

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