根据字段seller_id合并数组
数组$result如下

Array
(
    [0] => Array
        (
            [seller_id] => 17140
            [bp_counts] => 1
        )

    [1] => Array
        (
            [seller_id] => 17140
            [dr_counts] => 9
        )
    [3] => Array
        (
            [seller_id] => 17140
            [dc_counts] => 10
        )
)

希望得到的数组为

Array
(
    [0] => Array
        (
            [seller_id] => 17140
            [bp_counts] => 1
            [dr_counts] => 9
            [dc_counts] => 10
        )

)

求大神帮忙解决，谢谢。。。