BuddyPress.org

Try this in your theme/functions.php or in bp-custom.php

function klosurdo_unlink_fields( $field_value ) {

	$no_link_fields = array( 'Photographer Bio' );

	$bp_this_field_name = bp_get_the_profile_field_name();

	if ( in_array( $bp_this_field_name, $no_link_fields ) )
		$field_value = strip_tags( $field_value );

	return $field_value;

}
add_filter( 'bp_get_the_profile_field_value', 'klosurdo_unlink_fields', 99, 1 );