php数组如何迭代

我使用的是一个code igniter查询，它返回下面数组中的[year_totalsales]添加到数组中。

Array ( [0] => Array ( [year] => 2009 [month] => November [month_sales] => 524 [year_totalsales] => 3610 ) [1] => Array ( [year] => 2009 [month] => December [month_sales] => 521 [year_totalsales] => 3610 ) [2] => Array ( [year] => 2010 [month] => January [month_sales] => 609 [year_totalsales] => 3610 ) [3] => Array ( [year] => 2010 [month] => February [month_sales] => 619 [year_totalsales] => 3610 ) [4] => Array ( [year] => 2010 [month] => March [month_sales] => 732 [year_totalsales] => 3610 ) [5] => Array ( [year] => 2010 [month] => April [month_sales] => 605 [year_totalsales] => 3610 ) )

有没有一种方法可以让输出结果看起来像这样：

year-------------------------

month---------------monthsales