Is my second marriage here in US is legal if I’m married in the Philippines in Muslim tradition?

A second marriage is valid only if the previous marriage first was terminated through divorce, annulment or death. For someone with an invalid second marriage, it may be appropriate to obtain a divorce to terminate the first marriage and then have another wedding for the second marriage - it would be wise to consult with an attorney who, upon learning all of the relevant information, could provide specific advice for your situation and provide legal representation for a marriage-based immigration application. Some immigration law firms, including mine, offer legal services on a "flat fee" basis so that a client will know the total expense from the very beginning, and a few immigration law firms, including mine, offer an initial consultation free of charge.