{eyou:channelartlist typeid='总栏目id'}                                    
{eyou:channel type="son"}                                    
{$field.typename}<!-- 这是子栏目名称 -->    
{eyou:assign name="typeid" value="$field.typeid"}
<!-- 获取栏目id变量 -->
{eyou:sql sql="SELECT count(typeid) AS count FROM ey_archives WHERE typeid= $typeid" cachetime='-1'}
<span>{$field.count}</span>
{/eyou:sql}
{/eyou:channel}
{/eyou:channelartlist}

或者更方便的：

{eyou:channel typeid='总栏目id'}
{$field.typename}-{$field.typeid|GetTotalArc=###}
{/eyou:channel}