In principle, you do not need a view helper for this.
On the client side, just attach the jQuery datapicker to your element. How you target that element with a client-side selector is dependent upon the DOM hooks you have available in your page/form, but as an example, assuming a form with id myForm
and an input field with name myDate
that you would like to function as a datepicker, you could simply use:
function($){
$(document).ready(function(){
$('#myForm input[name="myDate"]').datePicker({
// datepicker options here
});
});
}(jQuery);
Of course, this presumes that jQuery is loaded when this runs and that the datepicker plugin is loaded by the time the ready event fires on the document object.