change attribute with double click

change attribute with double click

Hi
i have this code :

<a href="#"> <div class="hintu" aria-label="080000008">Blah</div></a>

i want when double on link change to this :

<a href="tel:080000008"> <div class="hintu" aria-label="080000008">Blah</div></a>

how to make this?

thnx