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I need to attach meta data to every menu item, with a key 'foo'. Is it possible to do that, without editing core WP?

A quick look at the nav-menu files showed that no hooks exist near the place I want to add the input box (below Description, here - http://cl.ly/0v2Z0X1n2e1L431t0h1G)

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As far as I know, it's totally not possible, however would be great if you elaborate your escenario so we can know exactly what are you trying to achieve ;) –  andresmijares25 Nov 13 '11 at 4:16
    
My use case is something close to the 'class' option, but I need to provide a <select> item, instead of having users enter the class names. –  Dogbert Nov 13 '11 at 7:46
    
You could add it per Javascript. There seems to be no other way. –  toscho Nov 13 '11 at 12:06
    
I'm gonna CRY!!!!11one –  frnhr Jan 22 '13 at 0:13
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1 Answer 1

up vote 6 down vote accepted

here is a quick code that should do the job, paste this in your theme's functions.php file

basically what it does is hide all regular class input boxes and adds a new select dropdown which changes the value of the hidden input based on the selected value.

and it looks like this;

enter image description here

function menu_item_class_select(){
    global $pagenow;
    if ($pagenow == "nav-menus.php"){
    ?>
    <script>
    jQuery(document).ready(function(){
        function create_dd(v){
            //create dropdown
            var dd = jQuery('<select class="my_class"></select>');
            //create dropdown options
            //array with the options you want
            var classes = ["","class1","class2","class3"];
            jQuery.each(classes, function(i,val) {
                if (v == val){
                    dd.append('<option value="'+val+'" selected="selected">'+val+'</option>');
                }else{
                    dd.append('<option value="'+val+'">'+val+'</option>');
                }
            });
            return dd;
        }

        jQuery(".edit-menu-item-classes").each(function() {
            //add dropdown
            var t = create_dd(jQuery(this).val());
            jQuery(this).before(t);
            //hide all inputs
            jQuery(this).css("display","none");

        });
        //update input on selection
        jQuery(".my_class").bind("change", function() {
            var v = jQuery(this).val();
            var inp = jQuery(this).next();
            inp.attr("value",v);
        });
    });


    </script>
    <?php
    }
}
add_action('admin_footer','menu_item_class_select');
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