[Como criar sub-menu nesse código]

    <div class='header-menu'>
      <div class='mobile-menu'/>
      <div class='container row'>
        <span class='slide-menu-toggle'/>
        <b:section class='main-menu' id='main-menu' maxwidgets='1' name='Main Menu' showaddelement='yes'>
          <b:widget id='LinkList74' locked='true' mobile='yes' title='Link List' type='LinkList' version='2' visible='true'>
            <b:widget-settings>
              <b:widget-setting name='link-7'>http://</b:widget-setting>
              <b:widget-setting name='link-5'>http://</b:widget-setting>
              <b:widget-setting name='link-6'>http://</b:widget-setting>
              <b:widget-setting name='link-3'>http://</b:widget-setting>
              <b:widget-setting name='link-4'>http://</b:widget-setting>
              <b:widget-setting name='text-1'>Menu</b:widget-setting>
              <b:widget-setting name='text-0'>Inicio</b:widget-setting>
              <b:widget-setting name='text-3'>Editar #</b:widget-setting>
              <b:widget-setting name='text-2'>Editar #</b:widget-setting>
              <b:widget-setting name='text-5'>Editar #</b:widget-setting>
              <b:widget-setting name='text-4'>Editar #</b:widget-setting>
              <b:widget-setting name='text-7'>Editar #</b:widget-setting>
              <b:widget-setting name='text-6'>Editar #</b:widget-setting>
              <b:widget-setting name='sorting'>NONE</b:widget-setting>
              <b:widget-setting name='link-1'>https://</b:widget-setting>
              <b:widget-setting name='link-2'>http://</b:widget-setting>
              <b:widget-setting name='link-0'>/</b:widget-setting>
            </b:widget-settings>

alguém ajuda por favor