How to remove Lis Pendens lien against real properties in California?

My wife's attorney has filed the "notice of pending action" also call "Lis Pendens" against my solely own properties because of the divorce peition filed last year. We are now getting back together and decided to withdraw the divorce petition, however, the "Lis Pendens" is still effect and shows on the county clerk office. Does any knows how to "remove" or expunge it? I am in Los Angeles CA. Thanks.-