$yArr = array(
1 => array('id'=>'1','parentid'=>0,'name'=>'一级栏目一'),
2 => array('id'=>'2','parentid'=>0,'name'=>'一级栏目二'),
3 => array('id'=>'3','parentid'=>1,'name'=>'二级栏目一'),
4 => array('id'=>'4','parentid'=>1,'name'=>'二级栏目二'),
5 => array('id'=>'5','parentid'=>2,'name'=>'二级栏目三'),
6 => array('id'=>'6','parentid'=>3,'name'=>'三级栏目一'),
7 => array('id'=&......
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