una/template/form_field_select.html

<select __attrs__>
    <bx_repeat:options>
        <bx_if:show_option_group_begin><optgroup label="__opt_label__"></bx_if:show_option_group_begin>
        <bx_if:show_option_group_end></optgroup></bx_if:show_option_group_end>
        <bx_if:show_option><option value="__opt_value__" __opt_attrs__<bx_if:show_selected> selected="selected"</bx_if:show_selected>>__opt_title__</option></bx_if:show_option>
    </bx_repeat:options>
</select>
__content__