I am not sure where this html tags are allowed where this text is going, but maybe something like this:
$text_to_add_after_price="<span class="myclass"> هر متر طول </span>";
Change myclass to the class you want to use.
I am not sure where this html tags are allowed where this text is going, but maybe something like this:
$text_to_add_after_price="<span class="myclass"> هر متر طول </span>";
Change myclass to the class you want to use.