I\'m looking at twitter\'s javascript file, and I see this in the templates hash:
Browse Interests{{/i}}\\u003C/a\\u003E\\n \\u003C/li\\u003E\\n {{#l
It's a unicode character. In this case \u003C and \u003E mean :
\u003C
\u003E
U+003C < Less-than sign U+003E > Greater-than sign
U+003C < Less-than sign
U+003E > Greater-than sign
See a list here