Dear,

I need to define two different value of ExtraFields of K2, for example "price" and "link for buy", and I need to define two different DIV for different value. However, there are only one PHP's function to output value.

Following are codes:
<span class="catItemExtraFieldsValue"><?php echo $extraField->value; ?></span>

QUESTION: How to define two different DIV for two Value of ExtraFields?

I think you need to display extra fields one by one, not a loop like the default.

if so, replace the code of displaying extra fields as below
for the field label/name, use this:
for the field value, use this:
where you get the fieldAlias from the extra fields manager in the backend.