Menubar displays root items horizontally and nested items as tiered.
<div class="card">
    <h:form>
        <p:growl id="messages"/>
        <p:menubar hideDelay="1000">
             <f:facet name="start">
                <p:graphicImage name="images/primefaces-logo.svg" library="showcase" />
            </f:facet>
            <p:submenu label="File" icon="pi pi-fw pi-file">
                <p:submenu label="New" icon="pi pi-fw pi-plus">
                    <p:menuitem value="Bookmark" icon="pi pi-fw pi-bookmark"/>
                    <p:menuitem value="Video" icon="pi pi-fw pi-video"/>
                </p:submenu>
                <p:menuitem value="Delete" icon="pi pi-fw pi-trash"/>
                <p:divider />
                <p:menuitem value="Export" icon="pi pi-fw pi-external-link"/>
                <p:menuitem value="Duplicate" icon="pi pi-fw pi-copy" disabled="true"/>
            </p:submenu>
            <p:submenu label="Edit" icon="pi pi-fw pi-pencil">
                <p:menuitem value="Left" icon="pi pi-fw pi-align-left"/>
                <p:menuitem value="Right" icon="pi pi-fw pi-align-right"/>
                <p:menuitem value="Center" icon="pi pi-fw pi-align-center"/>
                <p:menuitem value="Justify" icon="pi pi-fw pi-align-justify"/>
            </p:submenu>
            <p:submenu label="Users" icon="pi pi-fw pi-user">
                <p:menuitem value="New" icon="pi pi-fw pi-user-plus"/>
                <p:menuitem value="Delete" icon="pi pi-fw pi-user-minus"/>
                <p:submenu label="Search" icon="pi pi-fw pi-users">
                    <p:submenu label="Filter" icon="pi pi-fw pi-filter">
                        <p:menuitem value="Print" icon="pi pi-fw pi-print"/>
                    </p:submenu>
                    <p:menuitem value="List" icon="pi pi-fw pi-bars"/>
                </p:submenu>
            </p:submenu>
            <p:submenu label="Events" icon="pi pi-fw pi-calendar">
                <p:submenu label="Edit" icon="pi pi-fw pi-pencil">
                    <p:menuitem value="Save" icon="pi pi-fw pi-calendar-plus"/>
                    <p:menuitem value="Delete" icon="pi pi-fw pi-calendar-minus"/>
                </p:submenu>
                <p:submenu label="Archieve" icon="pi pi-fw pi-calendar-times">
                    <p:menuitem value="Remove" icon="pi pi-fw pi-calendar-minus"/>
                </p:submenu>
            </p:submenu>
            <p:divider layout="vertical"/>
            <p:menuitem value="Quit" icon="pi pi-fw pi-power-off"/>
            <f:facet name="end">
                <div class="ui-input-icon-left mr-2">
                    <i class="pi pi-fw pi-search" />
                    <p:inputText placeholder="Search"/>
                </div>
                <p:button value="Logout" icon="pi pi-fw pi-sign-out" styleClass="ui-button-info"/>
            </f:facet>
        </p:menubar>
    </h:form>
</div>