Why don’t you read the answers you get? In this answer I said to you to use get_post_meta instead of get_post_custom. The reason is quiet simple: get_post_meta( post_id, metakey, single ) returns a single value if single is set to true (RTFM!!)
If you would use get_post_meta(), than you will get your answer. If not, try unserialize()
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