Use get_json no JSTEE Exemplo
var v =$("#jseq_tree").jstree(true).get_json('#', { 'flat': true });
Perfect Platypus
var v =$("#jseq_tree").jstree(true).get_json('#', { 'flat': true });
var v =$("#jseq_tree").jstree(true).get_json('#', { 'flat': true });