Autocomplete

$(document).ready(function (){
    var items=[
        {label:"Product1" , category:"Laptop"},
        {label:"Product2" , category:"Laptop"},
        {label:"Product3" , category:"Laptop"},
        {label:"Product4" , category:"Tastatura"},
        {label:"Product5" , category:"Tastatura"},
        {label:"Product6" , category:"Tastatura"},
        {label:"Product7" , category:"Zvucnici"},
        {label:"Product8" , category:"Zvucni"},
    ]
    $("#autocomplete").autocomplete({
    source:items
    }).autocomplete("instance")._renderMenu=function( ul, items ) {
        var currentCategory=""
        $.each( items, function( index, item ) {
        if(item.category!=currentCategory)
        {
            ul.append("<li><b>"+item.category+"</b></li>")
            currentCategory=item.category;
        }
        ul.append("<li>"+item.label+"</li>")

        });
    }
})