Простой if для атрибутов - Управление атрибутами, характеристиками и т.п.

<?php
if (substr_count('</option>',$attribut->selects) > 1) {
        // больше одного
} else {
        // один или радио
}
<?php print $attribut->selects?>

<?php if (substr_count('</option>',$attribut->selects) =100){?>
            <span id='block_attr_sel_<?php print $attribut->attr_id?>'>
                <?php print $attribut->selects?>
            </span>
<?php }else{?>
        <span id='block_attr_sel_<?php print $attribut->attr_id?>'>
               <?php $str= print $attribut->selects?>
			   <?php $str1 = str_replace("<option%","<option value='3' disabled='disabled'",$str);?>
			   <?php print $str1;?>
			   </span>
<?php }?>

<?php if (substr_count('</option>',$attribut->selects) > 1){?>
            <span id='block_attr_sel_<?php print $attribut->attr_id?>'>
                <?php print $attribut->selects?>
            </span>
<?php }else{?>
        <span id='block_attr_sel_<?php print $attribut->attr_id?>'>
   			   <?php $str = str_replace("<select","<select disabled='disabled'",$attribut->selects);?>
			   <?php print $str;?>
			   </span>
<?php }?>

<?php if (substr_count($attribut->selects, '</option>') > 1){?>
            <span id='block_attr_sel_<?php print $attribut->attr_id?>'>
                <?php print $attribut->selects?>
            </span>
<?php }else{?>
        <span id='block_attr_sel_<?php print $attribut->attr_id?>'>
   			   <?php $str = str_replace("<select","<select disabled='disabled'",$attribut->selects);?>
			   <?php print $str;?>
			   </span>
<?php }?>