[cflsystems]

Yes it is possible. You can setup the position of the second set of categories lets say above 1000 and then an if statement that shows left side categories below 1000 and horizontal above 1000
It will be something like this

for left side
{foreach from=$categories_menu_list item=c}
{if $c.pos lt 1000}{$c.category}{/if}
{/foreach}

then for the horizontal menu
{foreach from=$categories_menu_list item=c}
{if $c.pos gt 1000}{$c.category}{/if}
{/foreach}

not sure on top of my head rightnow if it is pos or position