{iterate from=$dom item=d}
<option value="{$d.id}" {if $d.id eq $asso->dom}selected="selected"{/if}>{$d.nom} [{$d.cat}]</option>
{/iterate}
{iterate from=$dom item=d}
<option value="{$d.id}" {if $d.id eq $asso->dom}selected="selected"{/if}>{$d.nom} [{$d.cat}]</option>
{/iterate}