theme_links($links, $attributes = array('class' => 'links'))
Return a themed set of links
Parameters
$links A keyed array of links to be themed.
$attributes A keyed array of attributes
Return value
A string containing an unordered list of links.
对$links的补充说明：
A keyed array of links to be themed. The key for each link is used as its css class. Each link should be itself an array, with the following keys:
- title: the link text
- href: the link URL.
If omitted, the 'title' is shown as a plain text item in the links list.
- html: (optional) set this to TRUE if 'title' is already HTML.Array items are passed on to the l() function's $options parameter when creating the link.
一些例子：
$links = array(
'item1' => array( 'title' => '1st Item', 'href' => 'path/one' ),
'item2' => array( 'title' => '2nd Item', 'href' => 'path/two' ),
);
仅返回列表（没有链接）
array( 'title' => '3rd Item')
完全自定义链接：
'item3' => array( 'title' => '<a href="http://example.com">link text</a>', 'html' => TRUE ),
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