gistfile1.txt

1) /<(?!a |\/a).*?>/gi
2) /<a(.+?(href=["'](.+?)["'])?)?.*?>(.*?)<\/a>/gi

<a name="asdsad"></a>sad sa <a href="http://wdsad" name="sadasd">asd</a> <a href='sdfsdfdsf'>asdasd</a>sadsad<a>asdasd</a>

MATCH 1
1.	[2-3]	` `
4.	[17-17]	``
MATCH 2
1.	[30-50]	` href="http://wdsad"`
2.	[31-50]	`href="http://wdsad"`
3.	[37-49]	`http://wdsad`
4.	[65-68]	`asd`
MATCH 3
1.	[75-92]	` href='sdfsdfdsf'`
2.	[76-92]	`href='sdfsdfdsf'`
3.	[82-91]	`sdfsdfdsf`
4.	[93-99]	`asdasd`
MATCH 4
4.	[112-118]	`asdasd`

gistfile2.txt

3) /<([a-z][a-z0-9]*)(?:[^>]*(\shref=['\"][^'\"]*['\"]))?[^>]*?(\/?)>/gi

<a name="asdsad"></a>sad sa <a href="http://wdsad" name="sadasd">asd</a> <a href='sdfsdfdsf'>asdasd</a>sadsad<a>asdasd</a>

MATCH 1
1.	[1-2]	`a`
3.	[16-16]	``
MATCH 2
1.	[29-30]	`a`
2.	[30-50]	` href="http://wdsad"`
3.	[64-64]	``
MATCH 3
1.	[74-75]	`a`
2.	[75-92]	` href='sdfsdfdsf'`
3.	[92-92]	``
MATCH 4
1.	[110-111]	`a`
3.	[111-111]	``