It is not so easy.
hack is needed.
edit viewcat.php
line 45
$xoopsTpl->assign( 'lang_album_main' , _ALBM_MAIN ) ;
if( $cid > 0 ) {
$rs = $xoopsDB->query( "SELECT title FROM $table_cat WHERE cid='$cid'" ) ;
list( $cat_title ) = $xoopsDB->fetchRow( $rs ) ;
$xoopsTpl->assign( 'xoops_pagetitle' , $cat_title ) ;
// Category Specified
$xoopsTpl->assign( 'category_id' , $cid ) ;
$xoopsTpl->assign( 'subcategories' , myalbum_get_sub_categories( $cid , $cattree ) ) ; $xoopsTpl->assign( 'category_options' , myalbum_get_cat_options() ) ;
I will be append this feature into the next minor version of myAlbum-P.