review-imenu.el

(defun review-create-imenu-index ()
  (let ((index)
        (pattern "^\=+\\({.+}\\)? "))
    (save-excursion
      (goto-char (point-min))
      (while (re-search-forward pattern (point-max) t)
        (push (cons (buffer-substring-no-properties (line-beginning-position) (line-end-position))
                    (match-beginning 0)) index))
      (nreverse index))))

(add-hook 'review-mode-hook
          (lambda()
            (setq imenu-create-index-function 'review-create-imenu-index)
            ))