along the lines of (something)意思是Roughly similar to something; like something, though not exactly the same.
goes意思是saying的内容如是
something应该和along the lines of一个意思

这算是相当正式的说法了。
你完全可以把这部分当作一个完整的结构来记：There is a saying that goes （something） along the lines of...(后面的谚语一般都会用引号引起来）
具体而言, along the lines of = roughly similar to sth (though not necessary the same), or in keeping with。字典对line在这里的定义是：a specifc direction or procedure.
至于something这个词在这种结构里是衍生的，可以用较为常见（语法也比较顺滑的）somewhere或更加罕见的somewhat取代，当然去掉也不影响意思。