PHP嵌套迴圈輸出導航[不使用遞迴]

where('parent_id=0')->select();//$rs=$select->where('parent_id='.$parentid)->select();for($i=0;$i'.$rs[$i]['index'].'
';$index=$rs[$i]['index'];}//去重輸出首字母if($rs[$i]['index']!=$index){echo '
'.$rs[$i]['index'].'
';$index=$rs[$i]['index'];}echo $rs[$i]['name'].'
';$series=$select->where('parent_id='.$rs[$i]['id'])->select();for($j=0;$j';$model=$select->where('parent_id='.$series[$i]['id'])->select();for($x=0;$x';}//for()}}    }}

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