inline input select and button

        <div class="form-group">
            <label class="control-label">Category</label>
            <div class="input-group">
                <select class="form-control" style="border-right-radius:0; -webkit-appearance: none;" ng-model="category" ng-change="categoryChanged(category)" ng-options="category as category.name group by category.type for category in categories track by category.id">
                    <option value="">Select Category</option>
                </select>
                <span class="input-group-btn">
                    <button class="btn btn-default" type="button" ng-click="newCategory()" >
                        <span class="glyphicon glyphicon-plus"></span> New Category
                </button>
                </span>
            </div>
        </div>