function _initLabels() {
            $yobi.sendForm({
                "sURL"     : htVar.sURLProjectLabels,
                "htOptForm": {"method":"get"},
                "fOnLoad"  : function(data) {
                        _appendLabels(data);

                        for (var i = 0; i < aRequired.length; i++) {
                            var sCategory = aRequired[i];
                            if (!htElement.htCategory.hasOwnProperty(sCategory)) {
                                __addCategory(sCategory);
                            }
                        }

                        _hideLabelEditor();
                    }
            });
        }
Get list of tags from the server and show them in #tags div.