From http://bin.cakephp.org/saved/109708

new_gist_file

  <div class="fake-input" data-input="Input1"  style="background: url('/img/blabla.jpg');">Select your file</div>
    <div class="fake-input"  data-input="Input2" style="background: url('/img/blabla.jpg');">Select your file</div>
    <div class="fake-input"  data-input="Input3" style="background: url('/img/blabla.jpg');">Select your file</div>
    <input id="Input1" type="file" style="display:none" />
    <input id="Input2" type="file" style="display:none" />
    <input id="Input3" type="file" style="display:none" />
    <script type="text/javascript">
      $(document).on('click', '.fake-input', function(e) {
        console.log($('#' + $(this).data('input')));
        $('#' + $(this).data('input')).click();
      });
      $(document).on('change', 'input[type="file"]', function() {
        $('[data-input="' + $(this).attr('id') + '"]').text($(this).val());
      });
    </script>