Navigation tabs in BP-Social Theme

I'm experimenting with the BP-Social theme and I want to specify which Pages to use for navigation tabs in the header, rather than displaying all of them.

in navigation.php I modified the following line, which works:
<?php wp_list_pages( 'title_li=&depth=0&include=2,196,197,803,26,457' . bp_dtheme_page_on_front() ); ?>

However, I can't seem to get it to work by adding the line to child-style.php in the Child Theme. What do I need to do to keep the mod out of the Parent Theme?