BuddyPress.org

It’s generally preferred to let the user decide whether he wants to open a link in a new window or the same window. That said, you can use jQuery to force content to open a new window to happen:
http://stackoverflow.com/questions/4742746/jquery-open-new-window-on-page-load

Or, you could filter the output for the fields by adding a filter to bp_get_the_profile_field_value (you’ll be adding target="_blank" to the anchor tag). Here’s an example that removes hyperlinks from the output for specific fields:

function cpfb_unlink_fields( $field_value ) { 
 
	$options = array ( //These are the ids of the fields you want to target
					12,
					14 
	)
		
	if ( in_array( bp_get_the_profile_field_id(), $options ) )
		$field_value = strip_tags( $field_value );

	return $field_value;

}
add_filter( 'bp_get_the_profile_field_value', 'cpfb_unlink_fields', 998, 1 );